pith. sign in

arxiv: 2501.11377 · v4 · submitted 2025-01-20 · ❄️ cond-mat.supr-con · cond-mat.mtrl-sci· cond-mat.str-el· physics.optics

Optical control of the crystal structure in the bilayer nickelate superconductor La3Ni2O7 via nonlinear phononics

Shu Kamiyama , Tatsuya Kaneko , Kazuhiko Kuroki , Masayuki Ochi This is my paper

Pith reviewed 2026-05-23 05:26 UTC · model grok-4.3

classification ❄️ cond-mat.supr-con cond-mat.mtrl-scicond-mat.str-elphysics.optics
keywords nonlinear phononicsLa3Ni2O7crystal structure controlsuperconductivityinfrared excitationanharmonic couplingNi-O-Ni bond anglefirst-principles calculation
0
0 comments X

The pith

Resonant infrared light can shift the Ni-O-Ni bond angle in La3Ni2O7 closer to the straight configuration needed for superconductivity.

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

The paper proposes using nonlinear phononics to control the crystal structure of bilayer nickelate La3Ni2O7 with light rather than pressure. Resonant excitation of a chosen infrared-active vibration produces a nonlinear displacement in a Raman mode through anharmonic coupling, moving the interlayer Ni-O-Ni bond angle slightly toward 180 degrees. A sympathetic reader would care because this offers an optical route to reach the tetragonal symmetry linked to superconductivity. First-principles calculations of the anharmonic potential determine which IR mode produces the favorable shift.

Core claim

Resonant optical excitation of an appropriate infrared-active lattice vibration induces a nonlinear Raman-mode displacement through anharmonic phonon-phonon coupling on the lattice potential surface from first-principles calculations. This displacement brings the interlayer Ni-O-Ni bond angle slightly closer to straight, approaching the tetragonal symmetry that supports superconductivity under pressure.

What carries the argument

Anharmonic coupling between a resonantly driven IR phonon mode and a Raman mode that alters the interlayer Ni-O-Ni bond angle.

If this is right

  • Light irradiation can serve as an alternative to pressure for moving La3Ni2O7 toward the structural conditions associated with superconductivity.
  • Selective choice of the IR mode determines the direction of the induced structural change.
  • Nonlinear phononics offers a route to structural control in other complex oxides where superconductivity depends on specific bond angles.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

  • Time-resolved diffraction after laser pumping could directly test the predicted bond-angle shift on femtosecond timescales.
  • The same anharmonic mechanism might be applied to related nickelates or cuprates whose electronic properties also depend on metal-oxygen-metal angles.
  • If the displacement can be increased by stronger driving or better mode selection, the method could reach the full structural change achieved by pressure.

Load-bearing premise

The anharmonic lattice potential surface from first-principles calculations accurately gives both the sign and magnitude of the nonlinear phonon displacement under resonant driving.

What would settle it

A measurement showing the interlayer Ni-O-Ni bond angle moving away from straight or showing no change after selective resonant excitation of the targeted IR mode would contradict the predicted dynamics.

Figures

Figures reproduced from arXiv: 2501.11377 by Kazuhiko Kuroki, Masayuki Ochi, Shu Kamiyama, Tatsuya Kaneko.

Figure 1
Figure 1. Figure 1: FIG. 1. Crystal structure of La [PITH_FULL_IMAGE:figures/full_fig_p002_1.png] view at source ↗
Figure 2
Figure 2. Figure 2: FIG. 2. Atomic displacements for the (a) IR(42) and (b) Ra [PITH_FULL_IMAGE:figures/full_fig_p003_2.png] view at source ↗
Figure 3
Figure 3. Figure 3: FIG. 3. Time-averaged change of the bond angles, (a) ∆ [PITH_FULL_IMAGE:figures/full_fig_p004_3.png] view at source ↗
Figure 4
Figure 4. Figure 4: FIG. 4. Time evolution of (a) phonon amplitudes [PITH_FULL_IMAGE:figures/full_fig_p004_4.png] view at source ↗
Figure 5
Figure 5. Figure 5: FIG. 5. (a) Time-averaged phonon amplitude after light [PITH_FULL_IMAGE:figures/full_fig_p005_5.png] view at source ↗
Figure 6
Figure 6. Figure 6: (a) presenting the bond angles as a function of QR(9). As shown in [PITH_FULL_IMAGE:figures/full_fig_p006_6.png] view at source ↗
Figure 7
Figure 7. Figure 7: shows ∆¯θ, ∆ϕ¯ 1, and ∆ϕ¯ 2 as a function of the field amplitude F0 for the case where IR(42) is optically excited. We find that the changes in the bond angles are roughly proportional to F 2 0 . This originates from approximate relationships, QIR ∝ F0 and QR ∝ Q2 IR, which is because the IR and Raman modes are mainly driven by the external field and the phonon-phonon cou￾pling proportional to Q2 IR, respe… view at source ↗
Figure 8
Figure 8. Figure 8: FIG. 8. (a) Time-evolution of interlayer bond angle [PITH_FULL_IMAGE:figures/full_fig_p007_8.png] view at source ↗
Figure 9
Figure 9. Figure 9: FIG. 9. Atomic displacements for all the [PITH_FULL_IMAGE:figures/full_fig_p008_9.png] view at source ↗
Figure 10
Figure 10. Figure 10: FIG. 10. Electronic band dispersion for the original crys [PITH_FULL_IMAGE:figures/full_fig_p009_10.png] view at source ↗
Figure 11
Figure 11. Figure 11: FIG. 11. Time evolution of the phonon amplitude of IR(42) [PITH_FULL_IMAGE:figures/full_fig_p010_11.png] view at source ↗
Figure 12
Figure 12. Figure 12: FIG. 12. Comparison of the lattice potentials for the IR(42) [PITH_FULL_IMAGE:figures/full_fig_p010_12.png] view at source ↗
read the original abstract

Superconductivity in the bilayer nickelate La$_3$Ni$_2$O$_7$ occurs when the interlayer Ni-O-Ni bond angle becomes straight under pressure, suggesting a strong relationship between the crystal structure and the emergence of superconductivity. In this study, we theoretically propose a way to control the crystal structure of La$_3$Ni$_2$O$_7$ toward the tetragonal symmetry via light irradiation instead of pressure using the idea of nonlinear phononics. Here, resonant optical excitation of an infrared-active (IR) lattice vibration induces a nonlinear Raman-mode displacement through the anharmonic phonon-phonon coupling. We calculate the light-induced phonon dynamics on the anharmonic lattice potential determined by first-principles calculation. We find that the interlayer Ni-O-Ni bond angle gets slightly closer to straight when an appropriate IR mode is selectively excited. Our study suggests that light irradiation can be a promising way for structural control of La$_3$Ni$_2$O$_7$.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Referee Report

2 major / 2 minor

Summary. The manuscript proposes using nonlinear phononics to optically control the crystal structure of bilayer nickelate La3Ni2O7. Resonant driving of a selected infrared-active phonon mode is predicted to induce, through anharmonic coupling, a displacement along a Raman coordinate that reduces the deviation of the interlayer Ni-O-Ni bond angle from 180°, moving the structure slightly closer to the tetragonal symmetry associated with superconductivity under pressure. The dynamics are obtained by fitting an anharmonic lattice potential (up to fourth order) from first-principles total-energy surfaces and integrating the driven classical equations of motion.

Significance. A reliable prediction of the sign and direction of the nonlinear displacement would constitute a concrete proposal for light-induced structural tuning in a nickelate superconductor, offering an alternative to hydrostatic pressure. The work is grounded in first-principles electronic-structure methods rather than empirical fitting, but the absence of any validation or error analysis for the relevant anharmonic coefficients limits the strength of the central claim.

major comments (2)
  1. [Abstract and light-induced phonon dynamics section] Abstract and the section on light-induced phonon dynamics: the headline result that the interlayer Ni-O-Ni bond angle 'gets slightly closer to straight' is determined solely by the sign of the cubic and quartic coefficients in the anharmonic potential; the manuscript reports no convergence checks (k-point density, supercell size, or energy cutoff) for the total-energy surfaces used to extract these coefficients, nor any benchmark against experimental phonon anharmonicities or higher-level electronic-structure methods.
  2. [Calculation of light-induced phonon dynamics] The section describing the calculation of light-induced phonon dynamics: no quantitative error bars, sensitivity analysis, or comparison to the known pressure-induced structural changes are provided, so the description 'slightly closer' cannot be assessed for robustness or physical significance.
minor comments (2)
  1. The abstract should state the numerical magnitude of the predicted bond-angle change (in degrees) and the fluence or electric-field amplitude used in the simulation.
  2. Clarify the precise form of the anharmonic potential (which terms are retained) and whether the equations of motion are solved classically or with any quantum corrections.

Simulated Author's Rebuttal

2 responses · 0 unresolved

We thank the referee for the careful review and constructive feedback on our manuscript. The comments correctly identify areas where additional documentation of computational robustness would strengthen the central claims. We address each major comment below and outline the revisions we will make.

read point-by-point responses

  1. Referee: [Abstract and light-induced phonon dynamics section] Abstract and the section on light-induced phonon dynamics: the headline result that the interlayer Ni-O-Ni bond angle 'gets slightly closer to straight' is determined solely by the sign of the cubic and quartic coefficients in the anharmonic potential; the manuscript reports no convergence checks (k-point density, supercell size, or energy cutoff) for the total-energy surfaces used to extract these coefficients, nor any benchmark against experimental phonon anharmonicities or higher-level electronic-structure methods.

    Authors: We agree that explicit convergence tests are necessary to establish the reliability of the extracted anharmonic coefficients. In the revised manuscript we will add a new subsection reporting convergence of the total-energy surfaces with respect to k-point density, supercell size, and plane-wave cutoff. We will also compare our calculated harmonic phonon frequencies against available experimental Raman and infrared data for La3Ni2O7 to validate the underlying DFT setup. Direct experimental benchmarks for the anharmonic coefficients themselves are not available in the literature; we will state this limitation explicitly. Benchmarks against higher-level electronic-structure methods (e.g., hybrid functionals) are computationally prohibitive for the large supercells required and lie outside the present scope, but we will discuss the known accuracy of PBE for similar nickelate systems. revision: yes

  2. Referee: [Calculation of light-induced phonon dynamics] The section describing the calculation of light-induced phonon dynamics: no quantitative error bars, sensitivity analysis, or comparison to the known pressure-induced structural changes are provided, so the description 'slightly closer' cannot be assessed for robustness or physical significance.

    Authors: We accept that quantitative uncertainty estimates are required to judge the physical relevance of the small displacement. In the revision we will perform a sensitivity analysis by refitting the anharmonic potential while varying the input total-energy points within the numerical precision of the DFT calculations and report the resulting range of Ni-O-Ni angle changes. We will also compare the magnitude of the light-induced Raman displacement to the experimentally known pressure-induced change in the same angle, placing the optical effect in context. These additions will allow readers to assess whether the shift is robust and comparable in scale to pressure tuning. revision: yes

Circularity Check

0 steps flagged

No circularity; derivation is first-principles self-contained

full rationale

The central claim (light-induced Raman displacement reducing Ni-O-Ni angle deviation) is obtained by computing the anharmonic lattice potential surface from first-principles total-energy calculations, expanding to fourth order, and integrating the driven phonon equations of motion. No equations reduce the reported sign or magnitude to a fitted parameter defined from the same dataset; no self-citation chain is load-bearing for the anharmonic coefficients or dynamics; the result is not a renaming of a known empirical pattern. This matches the default expectation of a non-circular first-principles study.

Axiom & Free-Parameter Ledger

0 free parameters · 1 axioms · 0 invented entities

The central claim rests on the accuracy of the computed anharmonic phonon couplings and the validity of the classical driven-oscillator model for the light-induced dynamics; no new particles or forces are introduced.

axioms (1)
  • domain assumption First-principles calculations (likely DFT) yield a reliable anharmonic lattice potential for the relevant phonon modes
    Invoked when the paper states the potential is 'determined by first-principles calculation'

pith-pipeline@v0.9.0 · 5731 in / 1322 out tokens · 37905 ms · 2026-05-23T05:26:20.446959+00:00 · methodology

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.

Reference graph

Works this paper leans on

133 extracted references · 133 canonical work pages · 1 internal anchor

  1. [1]

    H. Sun, M. Huo, X. Hu, J. Li, Z. Liu, Y. Han, L. Tang, Z. Mao, P. Yang, B. Wang, J. Cheng, D.-X. Yao, G.-M. Zhang, and M. Wang, Signatures of superconductivity near 80 K in a nickelate under high pressure, Nature 621, 493 (2023)

    work page 2023

  2. [2]

    Zhang, L.-F

    Y. Zhang, L.-F. Lin, A. Moreo, and E. Dagotto, Elec- tronic structure, dimer physics, orbital-selective behav- ior, and magnetic tendencies in the bilayer nickelate su- perconductor La 3Ni2O7 under pressure, Phys. Rev. B 108, L180510 (2023)

    work page 2023

  3. [3]

    Q.-G. Yang, D. Wang, and Q.-H. Wang, Possibles ±- wave superconductivity in La3Ni2O7, Phys. Rev. B108, L140505 (2023)

    work page 2023

  4. [4]

    Lechermann, J

    F. Lechermann, J. Gondolf, S. B¨ otzel, and I. M. Eremin, Electronic correlations and superconducting instability in La 3Ni2O7 under high pressure, Phys. Rev. B108, L201121 (2023)

    work page 2023

  5. [5]

    Sakakibara, N

    H. Sakakibara, N. Kitamine, M. Ochi, and K. Kuroki, Possible highT c superconductivity in La 3Ni2O7 under high pressure through manifestation of a nearly half- filled bilayer Hubbard model, Phys. Rev. Lett.132, 106002 (2024)

    work page 2024

  6. [6]

    Y. Gu, C. Le, Z. Yang, X. Wu, and J. Hu, Effec- tive model and pairing tendency in the bilayer ni-based superconductor la 3ni2o7, Phys. Rev. B111, 174506 (2025)

    work page 2025

  7. [7]

    Y. Shen, M. Qin, and G.-M. Zhang, Effective bi- layer model hamiltonian and density-matrix renormal- ization group study for the high-T c superconductivity in La3Ni2O7 under high pressure, Chin. Phys. Lett.40, 127401 (2023)

    work page 2023

  8. [8]

    Christiansson, F

    V. Christiansson, F. Petocchi, and P. Werner, Corre- lated electronic structure of La 3Ni2O7 under pressure, Phys. Rev. Lett.131, 206501 (2023)

    work page 2023

  9. [9]

    Z. Liu, M. Huo, J. Li, Q. Li, Y. Liu, Y. Dai, X. Zhou, J. Hao, Y. Lu, M. Wang, and H.-H. Wen, Electronic correlations and partial gap in the bilayer nickelate La3Ni2O7, Nat. Commun.15, 7570 (2024)

    work page 2024

  10. [10]

    W. W´ u, Z. Luo, D.-X. Yao, and M. Wang, Superex- change and charge transfer in the nickelate superconduc- tor La 3Ni2O7 under pressure, Sci. China Phys. Mech. Astron.67, 117402 (2024)

    work page 2024

  11. [11]

    Cao and Y.-f

    Y. Cao and Y.-f. Yang, Flat bands promoted by hund’s rule coupling in the candidate double-layer high- temperature superconductor La3Ni2O7 under high pres- sure, Phys. Rev. B109, L081105 (2024)

    work page 2024

  12. [12]

    Hou, P.-T

    J. Hou, P.-T. Yang, Z.-Y. Liu, J.-Y. Li, P.-F. Shan, L. Ma, G. Wang, N.-N. Wang, H.-Z. Guo, J.-P. Sun, Y. Uwatoko, M. Wang, G.-M. Zhang, B.-S. Wang, and J.-G. Cheng, Emergence of high-temperature supercon- ducting phase in pressurized La 3Ni2O7 crystals, Chin. Phys. Lett.40, 117302 (2023)

    work page 2023

  13. [13]

    Liu, J.-W

    Y.-B. Liu, J.-W. Mei, F. Ye, W.-Q. Chen, and F. Yang, s±-wave pairing and the destructive role of apical- oxygen deficiencies in La 3Ni2O7 under pressure, Phys. Rev. Lett.131, 236002 (2023)

    work page 2023

  14. [14]

    Zhang, D

    Y. Zhang, D. Su, Y. Huang, Z. Shan, H. Sun, M. Huo, K. Ye, J. Zhang, Z. Yang, Y. Xu, Y. Su, R. Li, M. Smidman, M. Wang, L. Jiao, and H. Yuan, High- temperature superconductivity with zero resistance and 11 strange-metal behaviour in La3Ni2O7−δ, Nat. Phys.20, 1269 (2024)

    work page 2024

  15. [15]

    C. Lu, Z. Pan, F. Yang, and C. Wu, Interlayer-coupling- driven high-temperature superconductivity in La3Ni2O7 under pressure, Phys. Rev. Lett.132, 146002 (2024)

    work page 2024

  16. [16]

    Zhang, L.-F

    Y. Zhang, L.-F. Lin, A. Moreo, T. A. Maier, and E. Dagotto, Structural phase transition,s ±-wave pair- ing, and magnetic stripe order in bilayered superconduc- tor La 3Ni2O7 under pressure, Nat. Commun.15, 2470 (2024)

    work page 2024

  17. [17]

    Oh and Y.-H

    H. Oh and Y.-H. Zhang, Type-IIt−Jmodel and shared superexchange coupling from Hund’s rule in supercon- ducting La3Ni2O7, Phys. Rev. B108, 174511 (2023)

    work page 2023

  18. [18]

    Z. Liao, L. Chen, G. Duan, Y. Wang, C. Liu, R. Yu, and Q. Si, Electron correlations and superconductivity in La3Ni2O7 under pressure tuning, Phys. Rev. B108, 214522 (2023)

    work page 2023

  19. [19]

    Qu, D.-W

    X.-Z. Qu, D.-W. Qu, J. Chen, C. Wu, F. Yang, W. Li, and G. Su, Bilayert−J−J ⊥ model and magnetically mediated pairing in the pressurized nickelate La3Ni2O7, Phys. Rev. Lett.132, 036502 (2024)

    work page 2024

  20. [20]

    Yang, G.-M

    Y.-f. Yang, G.-M. Zhang, and F.-C. Zhang, Interlayer valence bonds and two-component theory for high-T c superconductivity of La 3Ni2O7 under pressure, Phys. Rev. B108, L201108 (2023)

    work page 2023

  21. [21]

    Jiang, Z

    K. Jiang, Z. Wang, and F.-C. Zhang, High-temperature superconductivity in La 3Ni2O7, Chin. Phys. Lett.41, 017402 (2024)

    work page 2024

  22. [22]

    Zhang, L.-F

    Y. Zhang, L.-F. Lin, A. Moreo, T. A. Maier, and E. Dagotto, Trends in electronic structures ands ±- wave pairing for the rare-earth series in bilayer nickelate superconductorR 3Ni2O7, Phys. Rev. B108, 165141 (2023)

    work page 2023

  23. [23]

    Y.-H. Tian, Y. Chen, J.-M. Wang, R.-Q. He, and Z.-Y. Lu, Correlation effects and concomitant two-orbitals ±- wave superconductivity in La 3Ni2O7 under high pres- sure, Phys. Rev. B109, 165154 (2024)

    work page 2024

  24. [24]

    Jiang, J

    R. Jiang, J. Hou, Z. Fan, Z.-J. Lang, and W. Ku, Pressure driven fractionalization of ionic spins results in cupratelike high-T c superconductivity in La 3Ni2O7, Phys. Rev. Lett.132, 126503 (2024)

    work page 2024

  25. [25]

    Z. Luo, B. Lv, M. Wang, W. W´ u, and D.-X. Yao, High-TC superconductivity in La 3Ni2O7 based on the bilayer two-orbitalt-Jmodel, npj Quantum Mater.9, 61 (2024)

    work page 2024

  26. [26]

    J. Yang, H. Sun, X. Hu, Y. Xie, T. Miao, H. Luo, H. Chen, B. Liang, W. Zhu, G. Qu, C.-Q. Chen, M. Huo, Y. Huang, S. Zhang, F. Zhang, F. Yang, Z. Wang, Q. Peng, H. Mao, G. Liu, Z. Xu, T. Qian, D.-X. Yao, M. Wang, L. Zhao, and X. J. Zhou, Orbital-dependent electron correlation in double-layer nickelate La3Ni2O7, Nat. Commun.15, 4373 (2024)

    work page 2024

  27. [27]

    Zhang, C

    M. Zhang, C. Pei, Q. Wang, Y. Zhao, C. Li, W. Cao, S. Zhu, J. Wu, and Y. Qi, Effects of pressure and dop- ing on Ruddlesden-Popper phases La n+1NinO3n+1, J. Mater. Sci. Technol.185, 147 (2024)

    work page 2024

  28. [28]

    G. Wang, N. N. Wang, X. L. Shen, J. Hou, L. Ma, L. F. Shi, Z. A. Ren, Y. D. Gu, H. M. Ma, P. T. Yang, Z. Y. Liu, H. Z. Guo, J. P. Sun, G. M. Zhang, S. Calder, J.-Q. Yan, B. S. Wang, Y. Uwatoko, and J.-G. Cheng, Pressure-induced superconductivity in polycrys- talline La3Ni2O7−δ, Phys. Rev. X14, 011040 (2024)

    work page 2024

  29. [29]

    Kaneko, H

    T. Kaneko, H. Sakakibara, M. Ochi, and K. Kuroki, Pair correlations in the two-orbital Hubbard ladder: Im- plications for superconductivity in the bilayer nickelate La3Ni2O7, Phys. Rev. B109, 045154 (2024)

    work page 2024

  30. [30]

    C. Lu, Z. Pan, F. Yang, and C. Wu, Interplay of twoE g orbitals in superconducting La 3Ni2O7 under pressure, Phys. Rev. B110, 094509 (2024)

    work page 2024

  31. [31]

    S. Ryee, N. Witt, and T. O. Wehling, Quenched pair breaking by interlayer correlations as a key to super- conductivity in La3Ni2O7, Phys. Rev. Lett.133, 096002 (2024)

    work page 2024

  32. [32]

    Ouyang, J.-M

    Z. Ouyang, J.-M. Wang, J.-X. Wang, R.-Q. He, L. Huang, and Z.-Y. Lu, Hund electronic correlation in La 3Ni2O7 under high pressure, Phys. Rev. B109, 115114 (2024)

    work page 2024

  33. [33]

    Y. Zhou, J. Guo, S. Cai, H. Sun, C. Li, J. Zhao, P. Wang, J. Han, X. Chen, Y. Chen, Q. Wu, Y. Ding, T. Xiang, H.-k. Mao, and L. Sun, Investigations of key issues on the reproducibility of high-tc superconductiv- ity emerging from compressed La 3Ni2O7, Matter Ra- diat. Extremes10, 027801 (2025)

    work page 2025

  34. [34]

    Qu, D.-W

    X.-Z. Qu, D.-W. Qu, X.-W. Yi, W. Li, and G. Su, Roles of hund’s rule and hybridization in the two-orbital model for high-Tc superconductivity in the bilayer nick- elate (2023), arXiv:2311.12769

    work page arXiv 2023

  35. [35]

    Kakoi, T

    M. Kakoi, T. Kaneko, H. Sakakibara, M. Ochi, and K. Kuroki, Pair correlations of the hybridized orbitals in a ladder model for the bilayer nickelate La 3Ni2O7, Phys. Rev. B109, L201124 (2024)

    work page 2024

  36. [36]

    Kaneko, M

    T. Kaneko, M. Kakoi, and K. Kuroki,t-jmodel for strongly correlated two-orbital systems: Application to bilayer nickelate superconductors, Phys. Rev. B112, 075143 (2025)

    work page 2025

  37. [37]

    Nakata, D

    M. Nakata, D. Ogura, H. Usui, and K. Kuroki, Finite- energy spin fluctuations as a pairing glue in systems with coexisting electron and hole bands, Phys. Rev. B 95, 214509 (2017)

    work page 2017

  38. [38]

    Dagotto, J

    E. Dagotto, J. Riera, and D. Scalapino, Superconduc- tivity in ladders and coupled planes, Phys. Rev. B45, 5744 (1992)

    work page 1992

  39. [39]

    Bulut, D

    N. Bulut, D. J. Scalapino, and R. T. Scalettar, Nodeless d-wave pairing in a two-layer hubbard model, Phys. Rev. B45, 5577 (1992)

    work page 1992

  40. [40]

    R. T. Scalettar, J. W. Cannon, D. J. Scalapino, and R. L. Sugar, Magnetic and pairing correlations in cou- pled hubbard planes, Phys. Rev. B50, 13419 (1994)

    work page 1994

  41. [41]

    R. E. Hetzel, W. von der Linden, and W. Hanke, Pairing correlations in a two-layer hubbard model, Phys. Rev. B50, 4159 (1994)

    work page 1994

  42. [42]

    R. R. dos Santos, Magnetism and pairing in hubbard bilayers, Phys. Rev. B51, 15540 (1995)

    work page 1995

  43. [43]

    A. I. Liechtenstein, I. I. Mazin, and O. K. Andersen,s- wave superconductivity from an antiferromagnetic spin- fluctuation model for bilayer materials, Phys. Rev. Lett. 74, 2303 (1995)

    work page 1995

  44. [44]

    Kuroki, T

    K. Kuroki, T. Kimura, and R. Arita, High-temperature superconductivity in dimer array systems, Phys. Rev. B 66, 184508 (2002)

    work page 2002

  45. [45]

    S. S. Kancharla and S. Okamoto, Band insulator to mott insulator transition in a bilayer hubbard model, Phys. Rev. B75, 193103 (2007)

    work page 2007

  46. [46]

    Bouadim, G

    K. Bouadim, G. G. Batrouni, F. H´ ebert, and R. T. Scalettar, Magnetic and transport properties of a cou- pled hubbard bilayer with electron and hole doping, Phys. Rev. B77, 144527 (2008). 12

    work page 2008

  47. [47]

    Lanat` a, P

    N. Lanat` a, P. Barone, and M. Fabrizio, Superconduc- tivity in the doped bilayer hubbard model, Phys. Rev. B80, 224524 (2009)

    work page 2009

  48. [48]

    H. Zhai, F. Wang, and D.-H. Lee, Antiferromagneti- cally driven electronic correlations in iron pnictides and cuprates, Phys. Rev. B80, 064517 (2009)

    work page 2009

  49. [49]

    T. A. Maier and D. J. Scalapino, Pair structure and the pairing interaction in a bilayer hubbard model for unconventional superconductivity, Phys. Rev. B84, 180513 (2011)

    work page 2011

  50. [50]

    Ouyang, M

    Z. Ouyang, M. Gao, and Z.-Y. Lu, Absence of electron- phonon coupling superconductivity in the bilayer phase of La3Ni2O7 under pressure, npj Quantum Mater.9, 80 (2024)

    work page 2024

  51. [51]

    Y. Li, Y. Cao, L. Liu, P. Peng, H. Lin, C. Pei, M. Zhang, H. Wu, X. Du, W. Zhao, K. Zhai, X. Zhang, J. Zhao, M. Lin, P. Tan, Y. Qi, G. Li, H. Guo, L. Yang, and L. Yang, Distinct ultrafast dynamics of bilayer and tri- layer nickelate superconductors regarding the density- wave-like transitions, Science Bulletin70, 180 (2025)

    work page 2025

  52. [52]

    X.-W. Yi, Y. Meng, J.-W. Li, Z.-W. Liao, W. Li, J.-Y. You, B. Gu, and G. Su, Nature of charge density waves and metal-insulator transition in pressurized La3Ni2O7, Phys. Rev. B110, L140508 (2024)

    work page 2024

  53. [53]

    Geisler, J

    B. Geisler, J. J. Hamlin, G. R. Stewart, R. G. Hen- nig, and P. J. Hirschfeld, Structural transitions, octa- hedral rotations, and electronic properties ofA 3Ni2O7 rare-earth nickelates under high pressure, npj Quantum Mater.9, 38 (2024)

    work page 2024

  54. [54]

    L. Wang, Y. Li, S.-Y. Xie, F. Liu, H. Sun, C. Huang, Y. Gao, T. Nakagawa, B. Fu, B. Dong, Z. Cao, R. Yu, S. I. Kawaguchi, H. Kadobayashi, M. Wang, C. Jin, H.-k. Mao, and H. Liu, Structure responsible for the superconducting state in La3Ni2O7 at high-pressure and low-temperature conditions, J. Am. Chem. Soc.146, 7506 (2024)

    work page 2024

  55. [55]

    N. Wang, G. Wang, X. Shen, J. Hou, J. Luo, X. Ma, H. Yang, L. Shi, J. Dou, J. Feng, J. Yang, Y. Shi, Z. Ren, H. Ma, P. Yang, Z. Liu, Y. Liu, H. Zhang, X. Dong, Y. Wang, K. Jiang, J. Hu, S. Nagasaki, K. Kitagawa, S. Calder, J. Yan, J. Sun, B. Wang, R. Zhou, Y. Uwa- toko, and J. Cheng, Bulk high-temperature supercon- ductivity in pressurized tetragonal La2P...

    work page 2024

  56. [56]

    Sakakibara, M

    H. Sakakibara, M. Ochi, H. Nagata, Y. Ueki, H. Saku- rai, R. Matsumoto, K. Terashima, K. Hirose, H. Ohta, M. Kato, Y. Takano, and K. Kuroki, Theoretical analy- sis on the possibility of superconductivity in the trilayer Ruddlesden-Popper nickelate La4Ni3O10 under pressure and its experimental examination: Comparison with La3Ni2O7, Phys. Rev. B109, 144511 (2024)

    work page 2024

  57. [57]

    Li, Y.-J

    Q. Li, Y.-J. Zhang, Z.-N. Xiang, Y. Zhang, X. Zhu, and H.-H. Wen, Signature of superconductivity in pressur- ized La4Ni3O10, Chin. Phys. Lett.41, 017401 (2024)

    work page 2024

  58. [58]

    Y. Zhu, D. Peng, E. Zhang, B. Pan, X. Chen, L. Chen, H. Ren, F. Liu, Y. Hao, N. Li, Z. Xing, F. Lan, J. Han, J. Wang, D. Jia, H. Wo, Y. Gu, Y. Gu, L. Ji, W. Wang, H. Gou, Y. Shen, T. Ying, X. Chen, W. Yang, H. Cao, C. Zheng, Q. Zeng, J.-G. Guo, and J. Zhao, Super- conductivity in pressurized trilayer La 4Ni3O10−δ single crystals, Nature631, 531 (2024)

    work page 2024

  59. [59]

    Zhang, C

    M. Zhang, C. Pei, D. Peng, X. Du, W. Hu, Y. Cao, Q. Wang, J. Wu, Y. Li, H. Liu, C. Wen, J. Song, Y. Zhao, C. Li, W. Cao, S. Zhu, Q. Zhang, N. Yu, P. Cheng, L. Zhang, Z. Li, J. Zhao, Y. Chen, C. Jin, H. Guo, C. Wu, F. Yang, Q. Zeng, S. Yan, L. Yang, and Y. Qi, Superconductivity in trilayer nickelate La4Ni3O10 under pressure, Phys. Rev. X15, 021005 (2025)

    work page 2025

  60. [60]

    Li, C.-Q

    J. Li, C.-Q. Chen, C. Huang, Y. Han, M. Huo, X. Huang, P. Ma, Z. Qiu, J. Chen, X. Hu, L. Chen, T. Xie, B. Shen, H. Sun, D.-X. Yao, and M. Wang, Structural transition, electric transport, and elec- tronic structures in the compressed trilayer nickelate La4Ni3O10, Sci. China Phys. Mech. Astron.67, 117403 (2024)

    work page 2024

  61. [61]

    L. C. Rhodes and P. Wahl, Structural routes to stabilize superconducting La 3Ni2O7 at ambient pressure, Phys. Rev. Mater.8, 044801 (2024)

    work page 2024

  62. [62]

    S. Wu, Z. Yang, X. Ma, J. Dai, M. Shi, H.-Q. Yuan, H.- Q. Lin, and C. Cao, Ac 3Ni2O7 and La 2AeNi2O6F (Ae = Sr, Ba): Benchmark materials for bilayer nickelate superconductivity (2024), arXiv:2403.11713

    work page arXiv 2024

  63. [63]

    M. Ochi, H. Sakakibara, H. Usui, and K. Kuroki, The- oretical study on the crystal structure of a bilayer nickel-oxychloride Sr3Ni2O5Cl2 and analysis on the oc- currence of possible unconventional superconductivity, Phys. Rev. B111, 064511 (2025)

    work page 2025

  64. [64]

    Yamane, Y

    K. Yamane, Y. Matsushita, S. Adachi, R. Matsumoto, K. Terashima, T. Hiroto, H. Sakurai, and Y. Takano, High-pressure synthesis of bilayer nickelate Sr3Ni2O5Cl2 with tetragonal crystal structure, Acta Cryst.C81, 259 (2025)

    work page 2025

  65. [65]

    E. K. Ko, Y. Yu, Y. Liu, L. Bhatt, J. Li, V. Thampy, C.-T. Kuo, B. Y. Wang, Y. Lee, K. Lee, J.-S. Lee, B. H. Goodge, D. A. Muller, and H. Y. Hwang, Sig- natures of ambient pressure superconductivity in thin film La3Ni2O7, Nature638, 935 (2025)

    work page 2025

  66. [66]

    G. Zhou, W. Lv, H. Wang, Z. Nie, Y. Chen, Y. Li, H. Huang, W. Chen, Y. Sun, Q.-K. Xue, and Z. Chen, Ambient-pressure superconductivity onset above 40 K in (La, Pr)3Ni2O7 films, Nature640, 641 (2025)

    work page 2025

  67. [67]

    Y. Liu, E. K. Ko, Y. Tarn, L. Bhatt, B. H. Goodge, D. A. Muller, S. Raghu, Y. Yu, and H. Y. Hwang, Su- perconductivity and normal-state transport in compres- sively strained La 2PrNi2O7 thin films, Nat. Mater.24, 1221 (2025)

    work page 2025

  68. [68]

    Zhao and A

    Y.-F. Zhao and A. S. Botana, Electronic structure of ruddlesden-popper nickelates: Strain to mimic the ef- fects of pressure, Phys. Rev. B111, 115154 (2025)

    work page 2025

  69. [69]

    Yue, J.-J

    C. Yue, J.-J. Miao, H. Huang, Y. Hua, P. Li, Y. Li, G. Zhou, W. Lv, Q. Yang, H. Sun, Y.-J. Sun, J. Lin, Q.-K. Xue, Z. Chen, and W.-Q. Chen, Correlated elec- tronic structures and unconventional superconductivity in bilayer nickelate heterostructures, National Science Review , nwaf253 (2025)

    work page 2025

  70. [70]

    Bhatt, A

    L. Bhatt, A. Y. Jiang, E. K. Ko, N. Schnitzer, G. A. Pan, D. F. Segedin, Y. Liu, Y. Yu, Y.-F. Zhao, E. A. Morales, C. M. Brooks, A. S. Botana, H. Y. Hwang, J. A. Mundy, D. A. Muller, and B. H. Goodge, Resolving structural origins for superconduc- tivity in strain-engineered La 3Ni2O7 thin films (2025), arXiv:2501.08204

    work page arXiv 2025

  71. [71]

    Geisler, J

    B. Geisler, J. J. Hamlin, G. R. Stewart, R. G. Hennig, and P. J. Hirschfeld, Electronic reconstruction and in- terface engineering of emergent spin fluctuations in com- pressively strained La3Ni2O7 on SrLaAlO4(001) (2025), arXiv:2503.10902. 13

    work page arXiv 2025

  72. [72]

    X.-W. Yi, W. Li, J.-Y. You, B. Gu, and G. Su, Unifying strain-driven and pressure-driven superconductivity in La3Ni2O7: Suppressed charge/spin density waves and enhanced interlayer coupling (2025), arXiv:2505.12733

    work page arXiv 2025

  73. [73]

    Theoretical study on ambient pressure superconductivity in La$_3$Ni$_2$O$_7$ thin films : structural analysis, model construction, and robustness of $s\pm$-wave pairing

    K. Ushio, S. Kamiyama, Y. Hoshi, R. Mizuno, M. Ochi, K. Kuroki, and H. Sakakibara, Theoretical study on ambient pressure superconductivity in La 3Ni2O7 thin films: structural analysis, model construction, and ro- bustness ofs±-wave pairing (2025), arXiv:2506.20497

    work page internal anchor Pith review Pith/arXiv arXiv 2025

  74. [74]

    F¨ orst, C

    M. F¨ orst, C. Manzoni, S. Kaiser, Y. Tomioka, Y. Tokura, R. Merlin, and A. Cavalleri, Nonlinear phononics as an ultrafast route to lattice control, Nat. Phys.7, 854 (2011)

    work page 2011

  75. [75]

    Subedi, A

    A. Subedi, A. Cavalleri, and A. Georges, Theory of nonlinear phononics for coherent light control of solids, Phys. Rev. B89, 220301 (2014)

    work page 2014

  76. [76]

    Mankowsky, A

    R. Mankowsky, A. Subedi, M. F¨ orst, S. O. Mariager, M. Chollet, H. T. Lemke, J. S. Robinson, J. M. Glow- nia, M. P. Minitti, A. Frano, M. Fechner, N. A. Spaldin, T. Loew, B. Keimer, A. Georges, and A. Cavalleri, Non- linear lattice dynamics as a basis for enhanced supercon- ductivity in YBa 2Cu3O6.5, Nature516, 71 (2014)

    work page 2014

  77. [77]

    Fechner and N

    M. Fechner and N. A. Spaldin, Effects of intense optical phonon pumping on the structure and electronic prop- erties of yttrium barium copper oxide, Phys. Rev. B94, 134307 (2016)

    work page 2016

  78. [78]

    Subedi, Proposal for ultrafast switching of ferro- electrics using midinfrared pulses, Phys

    A. Subedi, Proposal for ultrafast switching of ferro- electrics using midinfrared pulses, Phys. Rev. B92, 214303 (2015)

    work page 2015

  79. [79]

    Mankowsky, A

    R. Mankowsky, A. von Hoegen, M. F¨ orst, and A. Caval- leri, Ultrafast reversal of the ferroelectric polarization, Phys. Rev. Lett.118, 197601 (2017)

    work page 2017

  80. [80]

    Fechner, M

    M. Fechner, M. F¨ orst, G. Orenstein, V. Krapivin, A. S. Disa, M. Buzzi, A. von Hoegen, G. de la Pena, Q. L. Nguyen, R. Mankowsky, M. Sander, H. Lemke, Y. Deng, M. Trigo, and A. Cavalleri, Quenched lattice fluctua- tions in optically driven SrTiO 3, Nat. Mater.23, 363 (2024)

    work page 2024

Showing first 80 references.