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REVIEW 4 major objections 4 minor 100 references

Nonclassical dynamics of N\'eel vector and magnetization accompanied by THz and high-harmonic radiation from ultrafast-light-driven NiO antiferromagnet insulator

T0 review · 4 major / 4 minor · reviewed 2026-08-09 · deepseek-v4-flash

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Pith's one-line read Subgap-laser-driven NiO emits THz only when heavy-metal proximity adds spin-orbit coupling, and its Neel vector changes length without rotating.

desk verdict Plausible mechanism, but the missing Rashba hopping value makes the central quantitative claim untestable as written. read the letter →

arxiv 2502.00849 v4 pith:U5CP65E4 submitted 2025-02-02 cond-mat.str-el

Federico Garcia-Gaitan , Adrian E. Feiguin , Branislav K. Nikolic This is my paper · ORCID
classification cond-mat.str-el
keywords antiferromagneticinsulatorTHzspintronicsNeelvectornonequilibriummagnetizationHubbard-Hund-HeisenbergmodelRashbaspin-orbitcouplinghigh-harmonicgenerationfemtosecondlaserpulse
verification ladder T0 review T1 audit T2 compute T3 formal

The pith

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The reading

This paper tries to establish a microscopic mechanism for THz emission from NiO/Pt bilayers driven by subgap femtosecond laser pulses, replacing the borrowed ferromagnet/heavy-metal picture of an interlayer spin current. Using a two-orbital Hubbard-Hund-Heisenberg model on an 8-site ladder, with Rashba spin-orbit coupling added to mimic the platinum layer's proximity effect, it finds that both the Neel vector and the nonequilibrium magnetization change only in length along the z-axis and do not rotate, a dynamics no Landau-Lifshitz equation can describe. It further finds that THz radiation from both bond charge currents and the time-dependent magnetization is significant only when the proximity spin-orbit coupling is present, matching experiments on NiO/Pt. A sympathetic reader would care because this removes the need for speculative interlayer spin currents and offers a calculable route from strongly correlated many-body dynamics to radiated electromagnetic fields.

What carries the argument

The carrying object is a two-orbital Hubbard-Hund-Heisenberg (2HHH) model on a 4x2 ladder of Ni sites, with oxygen omitted but its mediated interactions encoded in realistic parameters ($U \approx 8$ eV, $t_0 \approx 1$ eV, $J_H \approx 1$ eV). A Rashba-type spin-orbit hopping $t_{SO}$ is added to represent proximity to a heavy metal; the laser enters as a Peierls phase multiplying the hoppings, and a static impurity field at site 1 selects Neel order. Time evolution is performed with numerically exact exact-diagonalization and tensor-network (tDMRG) methods, and the emitted electric field is obtained by feeding the bond current and magnetization into the Jefimenko far-field formula. This machinery lets the authors compute both the many-body spin-charge dynamics and the radiation it produces, and it is the source of the claim that length-changing, nonrotating spin dynamics generates the THz signal.

What would settle it

A direct test would be to measure THz emission from NiO/Pt bilayers while inserting an atomically thin insulating spacer between NiO and Pt: if emission persists when proximity spin-orbit coupling is suppressed but spin currents might still flow, or vanishes while spin currents would still be expected, the mechanism would be contradicted. A simpler check is to scan NiO thickness and compare the THz intensity with the predicted dominance of the thinnest proximitized layers.

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Extended reading notes

Core claim

The central claim is that subgap femtosecond pumping of NiO produces a highly nonclassical response: the Neel vector (the difference of the two sublattice magnetizations) and the nonequilibrium magnetization (their sum) both shrink or grow along the out-of-plane direction while never rotating. The magnetization stays exactly zero in plain NiO but becomes nonzero once Rashba spin-orbit coupling, modeling the proximity of a heavy-metal layer, is switched on. The paper computes far-field radiation from both time-dependent bond charge currents and the second time derivative of the magnetization, and finds that THz-frequency radiation from either source is significant only in the proximitized case, in full accord with NiO/Pt experiments. It therefore concludes that THz emission from antiferromagnetic-insulator/heavy-metal bilayers can arise from spin-orbit-enabled local charge and magnetization dynamics inside the antiferromagnet, with no interlayer spin current or inverse spin Hall conversion required. Above the THz range, the spectra show odd integer harmonics from the current channel, even integer harmonics from the magnetic-dipole channel, and unusual noninteger harmonics for above-gap pumping.

Load-bearing premise

The whole mechanism rests on an 8-site two-orbital ladder with no oxygen atoms, no explicit platinum layer, and a single impurity field reproducing the essential physics of a NiO/Pt bilayer; if omitted interfacial spin currents, oxygen-mediated exchange, or three-dimensional geometry materially changes the spin-charge dynamics, the mechanism as stated would not survive.

Editorial extensions

If this is right

  • THz emission from NiO/heavy-metal bilayers can be explained without any interlayer spin current, so experiments should focus on spin-orbit-induced charge and magnetization dynamics inside the antiferromagnet rather than on inverse spin Hall conversion.
  • Because magnetic-dipole radiation can rival or exceed bond-current radiation in the proximitized case, the common assumption that charge currents always dominate THz emission from magnetic bilayers does not carry over to antiferromagnetic insulators.
  • Even-integer high harmonics in the magnetic-dipole channel and odd-integer harmonics in the current channel give a symmetry-based way to identify which source is radiating.
  • Above-gap pumping partially destroys the Neel order (up to 15 percent) while subgap pumping leaves it almost intact, meaning the two pumping regimes drive qualitatively different magnetic responses.

Reading between the lines

Editorial extensions of the paper, not claims the author makes directly.

  • Beyond the paper, replacing the platinum layer with a different heavy metal should change the THz intensity through the strength of the induced Rashba coupling rather than through the metal's spin Hall angle, a testable distinction from the spin-current picture.
  • The model implies a strong thickness dependence: THz emission should be largest for the thinnest NiO films, where the proximity effect reaches the whole antiferromagnet; inserting a few atomic layers of a spacer should suppress emission even if spin currents could still pass.
  • The appearance of noninteger harmonics under above-gap pumping could be used as a probe of multi-Floquet-state population; a pump-intensity scan should show whether their spectral positions are tunable.
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Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, and a circularity audit.

Referee Report

4 major / 4 minor

Summary. The manuscript studies femtosecond-laser-driven NiO within a two-orbital Hubbard-Hund-Heisenberg model on a 4×2 ladder, with and without a Rashba-type spin-orbit coupling term intended to describe proximity to a Pt layer. Using exact diagonalization and tDMRG, it computes the time-dependent Néel vector, nonequilibrium magnetization, and far-field THz/high-harmonic radiation from both bond charge currents and the magnetic dipole. The central claims are: (i) subgap excitation produces nonclassical, length-only, non-rotating dynamics of the Néel vector and magnetization; (ii) THz emission from local charge currents and the magnetic dipole becomes significant only when Rashba SOC is switched on, which the authors argue explains NiO/Pt experiments without invoking an interlayer spin current; and (iii) above-gap excitation gives a sizable Néel-vector reduction and noninteger harmonics, while subgap excitation gives odd integer harmonics from currents and even integer harmonics from the magnetic dipole.

Significance. If the central mechanism is robust, the paper offers a conceptually useful alternative to the FM/HM picture of spintronic THz emission from antiferromagnetic insulators: THz radiation from NiO/Pt would originate from SOC-enabled local spin and charge dynamics inside NiO, rather than from an assumed interlayer spin current. The work also proposes a concrete, falsifiable prediction (even-order magnetic-dipole harmonics) and uses numerically exact time evolution for the chosen Hamiltonian, with parameters for U, t0, JH, and J inherited from prior DFT/DMFT work. The radiation calculation through the Jefimenko formula is a strength. However, the model is minimal—a single 8-site ladder, no explicit oxygen or Pt layers, an impurity field used to pin Néel order, and, most importantly, a Rashba hopping amplitude tSO whose numerical value is never specified. These gaps currently make the comparison between the plain and SOC cases qualitative and not fully reproducible.

major comments (4)
  1. [Model and Methods, Eq. (4), and Fig. 3(h)] The Rashba hopping amplitude tSO is never assigned a numerical value in eV or as a ratio to t0. The text states only that tSO is a 2×2 matrix hopping 'with values −itSO σ_y (itSO σ_x)' on horizontal (vertical) bonds; the scalar amplitude is absent. Since the central claim is that THz emission becomes significant only when this term is present, the entire plain-NiO vs SOC-NiO comparison rests on an unreported parameter. I request the value actually used, and a scan over at least the tens-of-meV range expected from DFT for AFI/HM interfaces (e.g., Ref. [42]), with the THz electric-field amplitude or power plotted versus tSO. Without this, Fig. 3(h) cannot be reproduced, and the statement 'in full accord with experiments' is not quantitatively grounded.
  2. [Model and Methods, Eqs. (1)–(4), Fig. 1, and footnote [75]] The study uses one 4×2 ladder with two orbitals per site, an impurity field B_imp^z = 0.1 eV at site 1, no explicit oxygen atoms, and no explicit Pt layer. These simplifications are acknowledged, but the footnote in Ref. [75] argues that omitting the HM layer is acceptable because experiments see the strongest THz signal for the thinnest NiO. That argument does not establish that an interlayer spin current, oxygen-mediated exchange, or three-dimensional geometry leaves the spin-charge dynamics unchanged. Because the paper's central claim is to explain the experiments without an interlayer spin current, a finite-size and model-robustness check is needed. At minimum, the authors should show that length-only dynamics, SOC-induced Mz(t), and the THz enhancement survive in a larger ladder (or a different lattice shape) simulated with tDMRG, and that the results do not depend strongly on the impurity-field strength or position.
  3. [Results and Discussion, Fig. 3(a)–(b), (e)–(f)] The central qualitative claim that the Néel vector and magnetization 'are changing length along the z-axis while not rotating at all' is supported only by the sentence that the x and y components are 'vanishingly small.' No time traces, Fourier amplitudes, or numerical upper bounds for Nx, Ny, Mx, and My are shown. Since this is the basis for labeling the dynamics 'nonclassical,' please provide these components for the subgap case and state the maximum ratios |N⊥|/|Nz| and |M⊥|/|Mz|. If the components are nonzero but small, the phrase 'not rotating at all' should be softened accordingly.
  4. [Figs. 3(d),(h) and 4(d),(h), and Refs. [11,12]] The phrase 'in full accord with experiments [11,12]' is supported only by the qualitative presence of THz radiation in the SOC case. There is no overlay with the experimental THz spectra of Refs. [11,12], no clear statement of the simulated emission band within the 0.1–3 THz range, and no intensity ratio between plain NiO and NiO/HM. Because the SOC strength is unconstrained, this comparison is not falsifiable as written. Please specify which experimental observable is being matched and show the simulated E-field or power spectrum over the relevant THz window, rather than only an FFT cut whose normalization is not described.
minor comments (4)
  1. [Introduction and Fig. 3 caption] There are several typos: 'Ie case' should be 'In the case', 'lectrons' should be 'electrons', 'efects' should be 'effects', and 'only only when' should be 'only when'.
  2. [Eq. (1) and surrounding text] The impurity field is described as a magnetic field on site i = 1, but Eq. (1) writes it as g μ_B B_imp^z s^z_{1α}, which is an orbital-resolved operator. Please clarify whether the field couples equally to both orbitals and whether it is meant to represent a local symmetry-breaking field rather than a physical magnetic impurity.
  3. [Model and Methods, after Eq. (3)] The dimensionless pump intensity zmax = e a0 A_max/ℏ is used, but no corresponding peak electric field in V/Å is given. Stating the peak field would help experimentalists gauge the intensity regime of the calculation.
  4. [Results and Discussion, noninteger harmonics] The noninteger harmonics for above-gap pumping are reported as an unusual result, but the explanation is limited to a brief reference to multiple Floquet-state populations. A sentence connecting the present observation to the mechanism of Ref. [29] would make the claim more useful to readers.

Circularity Check

0 steps flagged · score 0.0 of 10

No significant circularity: the central THz and HHG results are outputs of exact ED/tDMRG time evolution, not rescaled inputs or fitted parameters.

full rationale

The derivation chain is self-contained in the relevant sense. The many-body Hamiltonian in Eqs. (1)-(4) is fixed by independent NiO parameters (U≈8 eV, JH≈1 eV, t0≈1 eV, J=0.1 eV), and the Rashba term tSO is the only difference between the plain NiO and NiO/HM cases; tSO is not fitted to the THz data. The Neel-vector and magnetization trajectories are computed by numerically exact exact-diagonalization/tDMRG time evolution, and the radiation is obtained from those trajectories through the standard Jefimenko formulas, Eqs. (5)-(6). The statement that Mz(t)=0 in plain NiO follows from the U(1) spin-rotation symmetry of the SOC-free Hamiltonian, but the time-dependent Nz(t) response, the non-rotating character, the emergence of Mz(t) when SOC is added, and the relative magnitudes of current and magnetic-dipole THz contributions are simulation outputs rather than inputs. Self-citations such as Refs. [71], [76], and [85] are used as methodological background or as labels for 'nonclassical' dynamics; they do not supply the argument that produces the new figures. The main limitations, namely the unreported magnitude of tSO and the omission of an explicit HM layer, affect reproducibility and the strength of the 'in full accord with experiments' claim, but they are not circular: no computed quantity is defined in terms of the effect it is said to predict, and no fitted parameter is renamed as a prediction.

Assumptions & free parameters 4 free parameters · 4 assumptions · 1 invented entities

The simulation rests on a heavily simplified mapping of NiO/Pt to an 8-site ladder with implicit oxygen, implicit heavy metal, and an arbitrary symmetry-breaking impurity field. The central claims depend on the assumed validity of that mapping and on one parameter (tSO) whose value is not disclosed.

free parameters (4)
  • Rashba SOC hopping amplitude tSO = not specified in text
    Central to the claimed THz enhancement; Eq. (4) defines tSO matrices but no numerical value is given, so the strength of the proximity SOC is a hidden tuning knob.
  • Dimensionless pump intensity zmax = 0.2
    Chosen by hand; controls excitation strength and thus the magnitude of Néel vector reduction and radiation.
  • Impurity magnetic field B_imp^z = 0.1 eV
    Added at site 1 to lift degeneracy and stabilize Néel order; not present in the real undoped NiO and may affect subgap dynamics.
  • Heisenberg exchange J = 0.1 eV
    Set to isotropic J=Jz=0.1 eV without a first-principles derivation for this model; controls spin dynamics timescales.
assumptions (4)
  • domain assumption The 2HHH model on a 4x2 ladder with two orbitals per Ni site, no explicit O atoms, represents NiO's essential correlated-electron physics.
    Section Model and Methods; the model is taken from Ref. [2] but real NiO is a 3D rock-salt antiferromagnet, and O-mediated superexchange is folded into J and U values.
  • domain assumption Proximity Rashba SOC on the NiO side alone captures the effect of the Pt layer in NiO/Pt bilayers.
    They explicitly omit the HM layer; Eq. (4) and Fig. 1; this is the key modeling step for the THz claim.
  • domain assumption Landau-Lifshitz dynamics are inapplicable to S=1 AFIs and these parameters.
    Used to interpret 'nonclassical' dynamics; supported by self-cited Ref. [71], which is an assumption about validity, not a proven theorem for this model.
  • standard math Jefimenko formulas with homogeneous bond currents and far-field at 100a0 are valid for the ladder emitter.
    Eqs. (5)-(6); standard electrodynamics but applied to a nanoscale 8-site source with assumed homogeneous currents.
invented entities (1)
  • Static magnetic impurity field B_imp^z at site 1
    purpose: Break spin degeneracy and induce Néel checkerboard order in the ground state
    Added ad hoc in Eq. (1); no experimental counterpart in clean NiO; its effect on the magnetization dynamics is not isolated in the paper.

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Cite this review

Pith. "Pith review of Nonclassical dynamics of N\'eel vector and magnetization accompanied by THz and high-harmonic radiation from ultrafast-light-driven NiO antiferromagnet insulator." pith.science (2026). https://pith.science/paper/U5CP65E4

@misc{pith2026250200849,
  author       = {Pith},
  title        = {Pith review of: Nonclassical dynamics of N\'eel vector and magnetization accompanied by THz and high-harmonic radiation from ultrafast-light-driven NiO antiferromagnet insulator},
  year         = {2026},
  howpublished = {\url{https://pith.science/paper/U5CP65E4}},
  note         = {Machine review of arXiv:2502.00849}
}
read the original abstract

Ultrafast-light-driven strongly correlated antiferromagnetic insulators, such as prototypical NiO with large energy gap 4 eV, have recently attracted experimental attention using either above-gap [K. Gillmeister et al., Nat. Commun. 11, 4095 (2020)] or subgap [H. Qiu et al., Nat. Phys. 17, 388 (2021)] energy photons that are of fundamental interest in far-from-equilibrium quantum matter or spintronic applications, respectively. In the latter context, emission of THz radiation is also observed from NiO/Pt bilayers, where heavy metal (HM) Pt introduces strong spin-orbit coupling (SOC). However, microscopic mechanisms of such emission remain obscure because spintronic THz emitters have been amply studied using FM/HM (FM-ferromagnetic metal of conventional type) bilayers, where ultrafast demagnetization takes place and is directly related to THz emission. Conversely, in NiO total magnetization is zero prior to the fs laser pulse (fsLP) application. Here we employ the two-orbital Hubbard-Hund-Heisenberg model and study, via numerically exact nonequilibrium quantum many-body methods, the dynamics of its Neel vector and nonequilibrium magnetization. Additionally, we compute electromagnetic radiation by both time-dependent magnetization and local charge currents arising in either plain NiO or NiO with proximity SOC introduced by HM layer. Our analysis reveals nonclassical dynamics of Neel vector and nonequilibrium magnetization, changing only in length while not rotating, where the former is substantially reduced only in the case above-gap fsLP. In the plain NiO case, THz radiation of interest to applications is insignificant, but adding SOC enhances both current and magnetic dipole contributions to it. Above THz range, we find integer high-harmonic generation, as well as unusual noninteger harmonics for above-gap fsLP pump.

Figures

Figures reproduced from arXiv: 2502.00849 by the authors.

Figure 1
Figure 1. FIG. 1. Schematic view of two-orbitals-per-site 2HHH [PITH_FULL_IMAGE:figures/full_fig_p002_1.png] view at source ↗
Figure 3
Figure 3. FIG. 3. Time dependence, initiated by a fsLP with [PITH_FULL_IMAGE:figures/full_fig_p004_3.png] view at source ↗
Figure 4
Figure 4. FIG. 4. The same information as in Fig [PITH_FULL_IMAGE:figures/full_fig_p005_4.png] view at source ↗

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Reference graph

Works this paper leans on

100 extracted references · 72 canonical work pages

  1. [42]

    Dolui, A

    K. Dolui, A. Suresh, and B. K. Nikoli´ c, Spin pumping from antiferromagnetic insulator spin-orbit- proximitized by adjacent heavy metal: a first-principles Floquet-nonequilibrium Green function study, J. Phys. Mater. 5, 034002 (2022)

    work page 2022

  2. [75]

    We use monolayer of NiO and do not include HM layer explicitly due to high computational expense of our nu- merically exact calculations. Nevertheless, this limita- tion is not a drawback for capturing essential features of experiments as they find [12] the highest intensity of emitted THz radiation for the thinnest NiO layer driven by subgap fsLP

    work page

  3. [1]

    Y. Wang, M. Claassen, C. D. Pemmaraju, C. Jia, B. Moritz, and T. P. Devereaux, Theoretical under- standing of photon spectroscopies in correlated mate- rials in and out of equilibrium, Nat. Rev. Mater. 3, 312 (2018)

    2018

  4. [2]

    Gillmeister, D

    K. Gillmeister, D. Goleˇ z, C.-T. Chiang, N. Bittner, Y. Pavlyukh, J. Berakdar, P. Werner, and W. Widdra, Ultrafast coupled charge and spin dynamics in strongly correlated NiO, Nat. Commun. 11, 4095 (2020)

    2020

  5. [3]

    Murakami, D

    Y. Murakami, D. Goleˇ z, M. Eckstein, and P. Werner, Photo-induced nonequilibrium states in Mott insulators, arXiv:2310.05201 (2023)

    arXiv 2023

  6. [4]

    Y. Wang, M. Claassen, B. Moritz, and T. P. Devereaux, Producing coherent excitations in pumped Mott antifer- romagnetic insulators, Phys. Rev. B 96, 235142 (2017)

    2017

  7. [5]

    Oka, Nonlinear doublon production in a Mott insu- lator: Landau-Dykhne method applied to an integrable model, Phys

    T. Oka, Nonlinear doublon production in a Mott insu- lator: Landau-Dykhne method applied to an integrable model, Phys. Rev. B 86, 075148 (2012)

    2012

  8. [6]

    Shinjo, S

    K. Shinjo, S. Sota, and T. Tohyama, Glassy dynamics of the one-dimensional Mott insulator excited by a strong terahertz pulse, Phys. Rev. Res. 4, L032019 (2022)

    2022

Show all 100 references
  1. [7]

    Murakami, M

    Y. Murakami, M. Eckstein, and P. Werner, High- harmonic generation in Mott insulators, Phys. Rev. Lett. 121, 057405 (2018)

    2018

  2. [8]

    Murakami, S

    Y. Murakami, S. Takayoshi, A. Koga, and P. Werner, High-harmonic generation in one-dimensional Mott in- sulators, Phys. Rev. B 103, 035110 (2021)

    2021

  3. [9]

    Bajpai, B

    U. Bajpai, B. S. Popescu, P. Plech´ aˇ c, B. K. Nikoli´ c, L. E. F. Foa Torres, H. Ishizuka, and N. Nagaosa, Spatio-temporal dynamics of shift current quantum pumping by femtosecond light pulse, JPhys. Materials 2, 025004 (2019)

    2019

  4. [10]

    Grytsyuk, A

    S. Grytsyuk, A. Belabbes, P. M. Haney, H.-W. Lee, K.- J. Lee, M. D. Stiles, U. Schwingenschl¨ ogl, and A. Man- chon, k-asymmetric spin splitting at the interface be- tween transition metal ferromagnets and heavy metals, Phys. Rev. B 93, 174421 (2016)

    2016

  5. [11]

    H. Qiu, L. Zhou, C. Zhang, J. Wu, Y. Tian, S. Cheng, S. Mi, H. Zhao, Q. Zhang, D. Wu, et al. , Ultrafast spin current generated from an antiferromagnet, Nat. Phys. 17, 388 (2021)

    2021

  6. [12]

    Rongione, O

    E. Rongione, O. Gueckstock, M. Mattern, O. Gomonay, H. Meer, C. Schmitt, R. Ramos, T. Kikkawa, M. Miˇ cica, E. Saitoh, et al. , Emission of coherent thz magnons in an antiferromagnetic insulator triggered by ultra- fast spin–phonon interactions, Nat. Commun. 14, 1818 (2023)

    2023

  7. [13]

    Seifert, S

    T. Seifert, S. Jaiswal, U. Martens, J. Hannegan, L. Braun, P. Maldonado, F. Freimuth, A. Kronenberg, J. Henrizi, I. Radu, et al. , Efficient metallic spintronic emitters of ultrabroadband terahertz radiation, Nat. Photonics 10, 483 (2016)

    2016

  8. [14]

    Y. Wu, M. Elyasi, X. Qiu, M. Chen, Y. Liu, L. Ke, and H. Yang, High-performance THz emitters based on fer- romagnetic/nonmagnetic heterostructures, Adv. Mater. 29, 1603031 (2017)

    2017

  9. [15]

    M. B. Jungfleisch, Q. Zhang, W. Zhang, J. E. Pear- son, R. D. Schaller, H. Wen, and A. Hoffmann, Control of terahertz emission by ultrafast spin-charge current conversion at Rashba interfaces, Phys. Rev. Lett. 120, 207207 (2018)

    2018

  10. [16]

    Rouzegar, L

    R. Rouzegar, L. Brandt, L. c. v. N´ advorn´ ık, D. A. Reiss, A. L. Chekhov, O. Gueckstock, C. In, M. Wolf, T. S. Seifert, W. Brouwer, et al., Laser-induced terahertz spin transport in magnetic nanostructures arises from the same force as ultrafast demagnetization, Phys. Rev. B...

    2022

  11. [17]

    T. S. Seifert, D. Go, H. Hayashi, R. Rouze- gar, F. Freimuth, K. Ando, Y. Mokrousov, and T. Kampfrath, Time-domain observation of ballistic orbital-angular-momentum currents with giant relax- ation length in tungsten, Nat. Nanotechnol. 18, 1132 (2023)

    2023

  12. [18]

    Leitenstorfer, A

    A. Leitenstorfer, A. S. Moskalenko, T. Kampfrath, J. Kono, E. Castro-Camus, K. Peng, N. Qureshi, D. Turchinovich, K. Tanaka, A. G. Markelz, et al. , The 2023 terahertz science and technology roadmap, J. Phys. D 56, 223001 (2023)

    2023

  13. [19]

    Beaurepaire, J.-C

    E. Beaurepaire, J.-C. Merle, A. Daunois, and J.-Y. Bigot, Ultrafast spin dynamics in ferromagnetic nickel, Phys. Rev. Lett. 76, 4250 (1996)

    1996

  14. [20]

    X. Chen, R. Adam, D. E. B¨ urgler, F. Wang, Z. Lu, L. Pan, S. Heidtfeld, C. Greb, M. Liu, Q. Liu, J. Wang, C. M. Schneider, and D. Cao, Ultrafast demagnetization in ferromagnetic materials: Origins and progress, Phys. Rep. 1102, 1 (2025)

    2025

  15. [21]

    Y. Liu, H. Cheng, Y. Xu, P. Vallobra, S. Eimer, X. Zhang, X. Wu, T. Nie, and W. Zhao, Separation of emission mechanisms in spintronic terahertz emitters, Phys. Rev. B 104, 064419 (2021)

    2021

  16. [22]

    Beaurepaire, G

    E. Beaurepaire, G. M. Turner, S. M. Harrel, M. C. Beard, J.-Y. Bigot, and C. A. Schmuttenmaer, Coher- ent terahertz emission from ferromagnetic films excited by femtosecond laser pulses, Appl. Phys. Lett. 84, 3465 (2004)

    2004

  17. [23]

    X. Wang, R. Y. Engel, I. Vaskivskyi, D. Turenne, V. Shokeen, A. Yaroslavtsev, O. Gr˚ an¨ as, R. Knut, J. O. Schunck, S. Dziarzhytski, et al. , Ultrafast manipulation of the NiO antiferromagnetic order via sub-gap optical excitation, Faraday Discuss. 237, 300 (2022)

    2022

  18. [24]

    Kefayati and B

    A. Kefayati and B. K. Nikoli´ c, Origins of electro- magnetic radiation from spintronic terahertz emitters: A time-dependent density functional theory plus Je- fimenko equations approach, Phys. Rev. Lett. 133, 136704 (2024)

    2024

  19. [25]

    Kefayati, Y

    A. Kefayati, Y. Ren, M. B. Jungfleisch, L. Gundlach, J. Q. Xiao, and B. K. Nikolic, Deciphering the ori- gin of spin current in spintronic terahertz emitters and its imprint on their electromagnetic radiation via time- dependent density functional theory, arXiv:2410.07360 (2024)

    2024 arXiv

  20. [26]

    Varela-Manjarres, A

    J. Varela-Manjarres, A. Kefayati, M. B. Jungfleisch, J. Q. Xiao, and B. K. Nikoli´ c, Charge and spin cur- rent pumping by ultrafast demagnetization dynamics, Phys. Rev. B 110, L060410 (2024)

    2024

  21. [27]

    Saitoh, M

    E. Saitoh, M. Ueda, H. Miyajima, and G. Tatara, Con- version of spin current into charge current at room tem- perature: Inverse spin-Hall effect, Appl. Phys. Lett. 88, 182509 (2006)

    2006

  22. [28]

    J. Han, R. Cheng, L. Liu, H. Ohno, and S. Fukami, Coherent antiferromagnetic spintronics, Nat. Mater.22, 684 (2023)

    2023

  23. [29]

    C. S. Lange, T. Hansen, and L. B. Madsen, Noninte- ger high-order harmonic generation from extended cor- 7 related systems, Phys. Rev. A 109, 063103 (2024)

    2024

  24. [30]

    Tancogne-Dejean, F

    N. Tancogne-Dejean, F. G. Eich, and A. Rubio, Effect of spin-orbit coupling on the high harmonics from the topological Dirac semimetal Na3Bi, npj Comput. Mater. 8, 145 (2022)

    2022

  25. [31]

    Ghimire and D

    S. Ghimire and D. A. Reis, High-harmonic generation from solids, Nat. Phys. 15, 10 (2018)

    2018

  26. [32]

    C. P. Schmid, L. Weigl, P. Gr¨ ossing, V. Junk, C. Gorini, S. Schlauderer, S. Ito, M. Meierhofer, N. Hofmann, D. Afanasiev, et al., Tunable non-integer high-harmonic generation in a topological insulator, Nature 593, 385 (2021)

    2021

  27. [33]

    S. Imai, A. Ono, and S. Ishihara, High harmonic gener- ation in a correlated electron system, Phys. Rev. Lett. 124, 157404 (2020)

    2020

  28. [34]

    Orthodoxou, A

    C. Orthodoxou, A. Za¨ ır, and G. H. Booth, High har- monic generation in two-dimensional Mott insulators, npj Quantum Mater. 6, 76 (2021)

    2021

  29. [35]

    Saidl, P

    V. Saidl, P. Nˇ emec, P. Wadley, V. Hills, R. P. Cam- pion, V. Nov´ ak, K. W. Edmonds, F. Maccherozzi, S. S. Dhesi, B. L. Gallagher, et al. , Optical determination of the N´ eel vector in a CuMnAs thin-film antiferromagnet, Nat. Photonics 11, 91 (2017)

    2017

  30. [36]

    E. G. Galkina and B. A. Ivanov, Phenomenological de- scription of spin dynamics in antiferromagnets: Short history and modern development, Low Temp. Phys. 47, 765 (2021)

    2021

  31. [37]

    H. V. Gomonay and V. M. Loktev, Spin transfer and current-induced switching in antiferromagnets, Phys. Rev. B 81, 144427 (2010)

    2010

  32. [38]

    Manchon, H

    A. Manchon, H. C. Koo, J. Nitta, S. M. Frolov, and R. A. Duine, New perspectives for Rashba spin–orbit coupling, Nat. Mater. 14, 871 (2015)

    2015

  33. [39]

    B. K. Nikoli´ c, L. P. Zˆ arbo, and S. Souma, Imaging meso- scopic spin Hall flow: Spatial distribution of local spin currents and spin densities in and out of multiterminal spin-orbit coupled semiconductor nanostructures, Phys. Rev. B 73, 075303 (2006)

    2006

  34. [40]

    J. M. Marmolejo-Tejada, K. Dolui, P. Lazi´ c, P.-H. Chang, S. Smidstrup, D. Stradi, K. Stokbro, and B. K. Nikoli´ c, Proximity band structure and spin textures on both sides of topological-insulator/ferromagnetic-metal interface and their charge transport probes, Nano Lett. 17...

    2017

  35. [41]

    Dolui, U

    K. Dolui, U. Bajpai, and B. K. Nikoli´ c, Ef- fective spin-mixing conductance of topological- insulator/ferromagnet and heavy-metal/ferromagnet spin-orbit-coupled interfaces: A first-principles Floquet- nonequilibrium Green function approach, Phys. Rev. Mater. 4, 121201 (2020)

    2020

  36. [43]

    ˇZuti´ c, A

    I. ˇZuti´ c, A. Matos-Abiague, B. Scharf, H. Dery, and K. Belashchenko, Proximitized materials, Mater. Today 22, 85 (2019)

    2019

  37. [44]

    Nˇ emec, M

    P. Nˇ emec, M. Fiebig, T. Kampfrath, and A. V. Kimel, Antiferromagnetic opto-spintronics, Nat. Phys 14, 229 (2018)

    2018

  38. [45]

    Lechermann, W

    F. Lechermann, W. K¨ orner, D. F. Urban, and C. Els¨ asser, Interplay of charge-transfer and Mott- Hubbard physics approached by an efficient combina- tion of self-interaction correction and dynamical mean- field theory, Phys. Rev. B 100, 115125 (2019)

    2019

  39. [46]

    Bittner, D

    N. Bittner, D. Goleˇ z, H. U. R. Strand, M. Eckstein, and P. Werner, Coupled charge and spin dynamics in a photoexcited doped Mott insulator, Phys. Rev. B 97, 235125 (2018)

    2018

  40. [47]

    Krieger, J

    K. Krieger, J. K. Dewhurst, P. Elliott, S. Sharma, and E. K. U. Gross, Laser-induced demagnetization at ul- trashort time scales: Predictions of TDDFT, J. Chem. Theory Comput. 11, 4870 (2015)

    2015

  41. [48]

    Chen and L.-W

    Z. Chen and L.-W. Wang, Role of initial magnetic dis- order: A time-dependent ab initio study of ultrafast demagnetization mechanisms, Sci. Adv. 5, eaau8000 (2019)

    2019

  42. [49]

    N. Wu, S. Zhang, D. Chen, Y. Wang, and S. Meng, Three-stage ultrafast demagnetization dynamics in a monolayer ferromagnet, Nat. Commun.15, 2804 (2024)

    2024

  43. [50]

    M. S. Mrudul and P. M. Oppeneer, Ab initio investi- gation of laser-induced ultrafast demagnetization of l10 fept: Intensity dependence and importance of electron coherence, Phys. Rev. B 109, 144418 (2024)

    2024

  44. [51]

    Shokeen, M

    V. Shokeen, M. Sanchez Piaia, J.-Y. Bigot, T. M¨ uller, P. Elliott, J. K. Dewhurst, S. Sharma, and E. K. U. Gross, Spin flips versus spin transport in nonthermal electrons excited by ultrashort optical pulses in transi- tion metals, Phys. Rev. Lett. 119, 107203 (2017)

    2017

  45. [52]

    Tengdin, W

    P. Tengdin, W. You, C. Chen, X. Shi, D. Zusin, Y. Zhang, C. Gentry, A. Blonsky, M. Keller, P. M. Op- peneer, et al. , Critical behavior within 20 fs drives the out-of-equilibrium laser-induced magnetic phase transi- tion in nickel, Sci. Adv. 4, eaap9744 (2018)

    2018

  46. [53]

    J. K. Dewhurst, P. Elliott, S. Shallcross, E. K. U. Gross, and S. Sharma, Laser-induced intersite spin transfer, Nano Lett. 18, 1842 (2018)

    2018

  47. [54]

    Tancogne-Dejean, M

    N. Tancogne-Dejean, M. A. Sentef, and A. Rubio, Ultra- fast modification of Hubbard U in a strongly correlated material: Ab initio high-harmonic generation in NiO, Phys. Rev. Lett. 121, 097402 (2018)

    2018

  48. [55]

    O. K. Orhan and D. D. O’Regan, TDDFT+U: a critical assessment of the Hubbard U correction to exchange- correlation kernels and potentials, Phys. Rev. B 99, 165120 (2019)

    2019

  49. [56]

    V. I. Anisimov, J. Zaanen, and O. K. Andersen, Band theory and Mott insulators: Hubbard U instead of Stoner I, Phys. Rev. B 44, 943 (1991)

    1991

  50. [57]

    Zawadzki and A

    K. Zawadzki and A. E. Feiguin, Time- and momentum- resolved tunneling spectroscopy of pump-driven non- thermal excitations in Mott insulators, Phys. Rev. B 100, 195124 (2019)

    2019

  51. [58]

    Yang and A

    C. Yang and A. E. Feiguin, Spectral function of Mott- insulating Hubbard ladders: From fractionalized exci- tations to coherent quasiparticles, Phys. Rev. B 99, 235117 (2019)

    2019

  52. [59]

    G. W. Winkler, M. Ganahl, D. Schuricht, H. G. Evertz, and S. Andergassen, Interaction effects in a microscopic quantum wire model with strong spin–orbit interaction, New J. Phys. 19, 063009 (2017)

    2017

  53. [60]

    A. Nag, H. C. Robarts, F. Wenzel, J. Li, H. Elnag- gar, R.-P. Wang, A. C. Walters, M. Garc´ ıa-Fern´ andez, F. M. F. de Groot, M. W. Haverkort, et al., Many-body physics of single and double spin-flip excitations in NiO, Phys. Rev. Lett. 124, 067202 (2020)

    2020

  54. [61]

    Hoffmann and S

    M. Hoffmann and S. Bl¨ ugel, Systematic derivation of 8 realistic spin models for beyond-Heisenberg solids, Phys. Rev. B 101, 024418 (2020)

    2020

  55. [62]

    K. M. Stadler, G. Kotliar, S.-S. B. Lee, A. Weichsel- baum, and J. von Delft, Differentiating Hund from Mott physics in a three-band Hubbard-Hund model: Temper- ature dependence of spectral, transport, and thermody- namic properties, Phys. Rev. B 104, 115107 (2021)

    2021

  56. [63]

    S. R. White and A. E. Feiguin, Real-time evolution using the density matrix renormalization group, Phys. Rev. Lett. 93, 076401 (2004)

    2004

  57. [64]

    A. J. Daley, C. Kollath, U. Schollw¨ ock, and G. Vidal, Time-dependent density-matrix renormalization-group using adaptive effective Hilbert spaces, J. Stat. Mech. 2004, P04005 (2004)

    2004

  58. [65]

    Schmitteckert, Nonequilibrium electron transport us- ing the density matrix renormalization group method, Phys

    P. Schmitteckert, Nonequilibrium electron transport us- ing the density matrix renormalization group method, Phys. Rev. B 70, 121302 (2004)

    2004

  59. [66]

    A. E. Feiguin, The density matrix renormalization group and its time-dependent variants, AIP Conf. Proc. 1419, 5 (2011)

    2011

  60. [67]

    Innerberger, P

    M. Innerberger, P. Worm, P. Prauhart, and A. Kauch, Electron-light interaction in nonequilibrium: exact di- agonalization for time-dependent Hubbard hamiltoni- ans, Eur. Phys. J. Plus 135, 922 (2020)

    2020

  61. [68]

    K. Ido, M. Kawamura, Y. Motoyama, K. Yoshimi, Y. Yamaji, S. Todo, N. Kawashima, and T. Misawa, Update of HΦ: Newly added functions and methods in versions 2 and 3, Comput. Phys. Commun. 298, 109093 (2024)

    2024

  62. [69]

    Kawamura, K

    M. Kawamura, K. Yoshimi, T. Misawa, Y. Yamaji, S. Todo, and N. Kawashima, Quantum lattice model solver HΦ, Comput. Phys. Commun. 217, 180 (2017)

    2017

  63. [70]

    Lerose, M

    A. Lerose, M. Sonner, and D. A. Abanin, Overcom- ing the entanglement barrier in quantum many-body dynamics via space-time duality, Phys. Rev. B 107, L060305 (2023)

    2023

  64. [71]

    Garcia-Gaitan and B

    F. Garcia-Gaitan and B. K. Nikoli´ c, Fate of entangle- ment in magnetism under lindbladian or non-Markovian dynamics and conditions for their transition to Landau- Lifshitz-Gilbert classical dynamics, Phys. Rev. B 109, L180408 (2024)

    2024

  65. [72]

    Rinc´ on, E

    J. Rinc´ on, E. Dagotto, and A. E. Feiguin, Photoinduced Hund excitons in the breakdown of a two-orbital Mott insulator, Phys. Rev. B 97, 235104 (2018)

    2018

  66. [73]

    Lysne, Y

    M. Lysne, Y. Murakami, and P. Werner, Signatures of bosonic excitations in high-harmonic spectra of Mott insulators, Phys. Rev. B 101, 195139 (2020)

    2020

  67. [74]

    H. U. R. Strand, D. Goleˇ z, M. Eckstein, and P. Werner, Hund’s coupling driven photocarrier relaxation in the two-band Mott insulator, Phys. Rev. B 96, 165104 (2017)

    2017

  68. [76]

    M. D. Petrovi´ c, P. Mondal, A. E. Feiguin, and B. K. Nikoli´ c, Quantum spin torque driven transmutation of an antiferromagnetic Mott insulator, Phys. Rev. Lett. 126, 197202 (2021)

    2021

  69. [77]

    Held, Electronic structure calculations using dynam- ical mean field theory, Adv

    K. Held, Electronic structure calculations using dynam- ical mean field theory, Adv. Phys. 56, 829 (2007)

    2007

  70. [78]

    Kuneˇ s, V

    J. Kuneˇ s, V. I. Anisimov, A. V. Lukoyanov, and D. Voll- hardt, Local correlations and hole doping in NiO: A dynamical mean-field study, Phys. Rev. B 75, 165115 (2007)

    2007

  71. [79]

    Zhang, P

    L. Zhang, P. Staar, A. Kozhevnikov, Y.-P. Wang, J. Tri- nastic, T. Schulthess, and H.-P. Cheng, DFT + DMFT calculations of the complex band and tunneling behav- ior for the transition metal monoxides MnO, FeO, CoO, and NiO, Phys. Rev. B 100, 035104 (2019)

    2019

  72. [80]

    Scheie, P

    A. Scheie, P. Laurell, A. M. Samarakoon, B. Lake, S. E. Nagler, G. E. Granroth, S. Okamoto, G. Alvarez, and D. A. Tennant, Witnessing entanglement in quantum magnets using neutron scattering, Phys. Rev. B 103, 224434 (2021)

    2021

  73. [81]

    Laurell, A

    P. Laurell, A. Scheie, E. Dagotto, and D. A. Tennant, Witnessing entanglement and quantum correlations in condensed matter: A review, arXiv:2405.10899 (2024)

    2024 arXiv

  74. [82]

    Panati, H

    G. Panati, H. Spohn, and S. Teufel, Effective dynamics for Bloch electrons: Peierls substitution and beyond, Commun. Math. Phys 242, 547 (2003)

    2003

  75. [83]

    J. Li, D. Golez, G. Mazza, A. J. Millis, A. Georges, and M. Eckstein, Electromagnetic coupling in tight-binding models for strongly correlated light and matter, Phys. Rev. B 101, 205140 (2020)

    2020

  76. [84]

    Ridley, L

    M. Ridley, L. Kantorovich, R. van Leeuwen, and R. Tuovinen, Quantum interference and the time- dependent radiation of nanojunctions, Phys. Rev. B 103, 115439 (2021)

    2021

  77. [85]

    Suresh and B

    A. Suresh and B. K. Nikoli´ c, Quantum classical ap- proach to spin and charge pumping and the ensuing radiation in terahertz spintronics: Example of the ul- trafast light-driven weyl antiferromagnet Mn 3Sn, Phys. Rev. B 107, 174421 (2023)

    2023

  78. [86]

    O. D. Jefimenko, Electricity and Magnetism (Appleton Century-Crofts, New York, 1966)

    1966

  79. [87]

    D. J. Griffiths and M. A. Heald, Time-dependent gen- eralizations of the Biot–Savart and Coulomb laws, Am. J. Phys. 59, 111 (1991)

    1991

  80. [88]

    K. T. McDonald, The relation between expressions for time-dependent electromagnetic fields given by Jefi- menko and by Panofsky and Phillips, Am. J. Phys. 65, 1074 (1997)

    1997

  81. [89]

    Kampfrath, A

    T. Kampfrath, A. Sell, G. Klatt, A. Pashkin, S. M¨ ahrlein, T. Dekorsy, M. Wolf, M. Fiebig, A. Leiten- storfer, and R. Huber, Coherent terahertz control of an- tiferromagnetic spin waves, Nat. Photonics5, 31 (2011)

    2011

  82. [90]

    Satoh, S.-J

    T. Satoh, S.-J. Cho, R. Iida, T. Shimura, K. Kuroda, H. Ueda, Y. Ueda, B. A. Ivanov, F. Nori, and M. Fiebig, Spin oscillations in antiferromagnetic NiO triggered by circularly polarized light, Phys. Rev. Lett. 105, 077402 (2010)

    2010

  83. [91]

    A. V. Kimel, B. A. Ivanov, R. V. Pisarev, P. A. Us- achev, A. Kirilyuk, and T. Rasing, Inertia-driven spin switching in antiferromagnets, Nat. Phys. 5, 727 (2009)

    2009

  84. [92]

    T. G. H. Blank, K. A. Grishunin, B. A. Ivanov, E. A. Mashkovich, D. Afanasiev, and A. V. Kimel, Empow- ering control of antiferromagnets by Thz-induced spin coherence, Phys. Rev. Lett. 131, 096701 (2023)

    2023

  85. [93]

    L. D. Landau and E. M. Lifshitz, On the theory of the dispersion of magnetic permeability in ferromagnetic bodies, Phys. Z. Sowjetunion 8, 153 (1935)

    1935

  86. [94]

    Formisano, T

    F. Formisano, T. T. Gareev, D. I. Khusyainov, A. E. Fe- dianin, R. M. Dubrovin, P. P. Syrnikov, D. Afanasiev, R. V. Pisarev, A. M. Kalashnikova, J. H. Mentink,et al., 9 Coherent THz spin dynamics in antiferromagnets be- yond the approximation of the N´ eel vector, APL Mater. 1...

    2024

  87. [95]

    J. H. Mentink, K. Balzer, and M. Eckstein, Ultrafast and reversible control of the exchange interaction in Mott insulators, Nat. Commun. 6, 6708 (2015)

    2015

  88. [96]

    Mitrofanov and S

    A. Mitrofanov and S. Urazhdin, Nonclassical spin trans- fer effects in an antiferromagnet, Phys. Rev. Lett. 126, 037203 (2021)

    2021

  89. [97]

    Afanasiev, A

    D. Afanasiev, A. Gatilova, D. J. Groenendijk, B. A. Ivanov, M. Gibert, S. Gariglio, J. Mentink, J. Li, N. Dasari, M. Eckstein, et al. , Ultrafast spin dynamics in photodoped spin-orbit Mott insulator Sr 2IrO4, Phys. Rev. X 9, 021020 (2019)

    2019

  90. [98]

    Neufeld, D

    O. Neufeld, D. Podolsky, and O. Cohen, Floquet group theory and its application to selection rules in harmonic generation, Nat. Commun. 10, 405 (2019)

    2019

  91. [99]

    Lysne, Y

    M. Lysne, Y. Murakami, M. Sch¨ uler, and P. Werner, High-harmonic generation in spin-orbit coupled sys- tems, Phys. Rev. B 102, 081121 (2020)

    2020

  92. [100]

    A. V. Kimel and M. Li, Writing magnetic memory with ultrashort light pulses, Nat. Rev. Mater. 4, 189 (2019)

    2019

Pith tools

Reviewed August 9, 2026 · model on record in the stance chip above.