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arxiv: 2606.26063 · v1 · pith:CILICKE6new · submitted 2026-06-24 · ❄️ cond-mat.mes-hall · cond-mat.mtrl-sci· physics.chem-ph

Quantum Back-Action Expands the Excitonic Hilbert Space in a Soft Polar Semiconductor

Arnab Ghosh , Patrick Brosseau , Priya Nagpal , Dmitry N. Dirin , Rui Tao , Maksym V. Kovalenko , Patanjali Kambhampati This is my paper

Pith reviewed 2026-06-25 19:13 UTC · model grok-4.3

classification ❄️ cond-mat.mes-hall cond-mat.mtrl-sciphysics.chem-ph
keywords excitonspolaronslead-halide perovskitesquantum back-actionHilbert space expansionmultidimensional spectroscopyquasiparticle formationelectron-phonon coupling
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The pith

An electronic excitation expands its excitonic Hilbert space in real time through back-action on the lattice polarization field.

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

The paper challenges the usual sequence in which excitonic states are fixed at the instant of light absorption and the lattice only acts afterward through renormalization or dephasing. In lead-halide perovskite nanocrystals the authors report that the optical pulse first creates one excitonic polarization, X1; a second configuration, X2, appears only after the collective polaron field has developed, and coherent coupling between X1 and X2 forms at still later times. This sequence shows that strong system-bath coupling can actively enlarge the set of optically accessible states rather than merely perturbing a pre-existing manifold. The result distinguishes state formation from coherence formation as separate stages of quasiparticle evolution, a separation absent in the conventional limit observed in CdSe quantum dots.

Core claim

The optical pulse first prepares an excitonic polarization, X1. A second configuration, X2, emerges only after the polaron field develops, while coherent X1-X2 coupling appears at later times. State formation and coherence formation are therefore resolved as distinct stages of quasiparticle formation. In contrast, CdSe quantum dots exhibit the conventional limit in which excitonic states and couplings are present at time zero and are only weakly perturbed by phonons. A dynamical polaron-field model describes the lattice polarization as an order parameter that expands the optically accessible manifold and generates time-dependent coherent coupling.

What carries the argument

The dynamical polaron field treated as an order parameter that expands the optically accessible excitonic manifold and produces time-dependent coherent coupling between configurations.

If this is right

  • State formation and coherence formation occur as temporally separated stages.
  • The observed diagonal and anti-diagonal splittings increase with nanocrystal size and correlate with radiative oscillator strength, opposite to simple quantum-confinement expectations.
  • Strong system-bath coupling actively creates additional excitonic states rather than only perturbing a fixed manifold.
  • Conventional semiconductors display the opposite limit in which the full excitonic manifold is available at time zero.

Where Pith is reading between the lines

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

  • The mechanism may operate in other soft ionic lattices where electron-phonon coupling is strong enough for the polaron field to act as a dynamical order parameter.
  • Time-resolved coherent spectroscopy could map the chronological order of quasiparticle-component assembly across a broader class of materials.
  • Device design could attempt to tune the delay between state creation and coherence onset to optimize emission or charge-transfer timing.

Load-bearing premise

The time-dependent appearance of X2 and the later coherent coupling are produced by polaron-field expansion of the Hilbert space rather than by conventional phonon sidebands, experimental artifacts, or post-selection effects in the spectra.

What would settle it

Multidimensional spectra recorded on the same perovskite nanocrystals that show X2 appearing at time zero with no dependence on polaron development, or that exhibit the same delayed behavior in rigid non-polar materials, would falsify the claim of dynamic Hilbert-space expansion.

read the original abstract

Electronic excitations in solids are commonly described within a hierarchy in which the excitonic Hamiltonian is defined first and the lattice acts later through renormalization, relaxation, and dephasing. This picture assumes that the optically accessible excitonic manifold is already present at the moment of photoexcitation. Here we show that this assumption fails in a soft polar semiconductor. Using femtosecond coherent multidimensional spectroscopy on lead-halide perovskite nanocrystals, we observe quantum back-action between an electronic excitation and a collective lattice-polarization field that expands the excitonic Hilbert space in real time. The optical pulse first prepares an excitonic polarization, X1. A second configuration, X2, emerges only after the polaron field develops, while coherent X1-X2 coupling appears at later times. State formation and coherence formation are therefore resolved as distinct stages of quasiparticle formation. In contrast, CdSe quantum dots exhibit the conventional limit in which excitonic states and couplings are present at time zero and are only weakly perturbed by phonons. The observed diagonal and anti-diagonal splittings increase with nanocrystal size and correlate with radiative oscillator strength, opposite to expectations from simple quantum confinement. A dynamical polaron-field model describes the lattice polarization as an order parameter that expands the optically accessible manifold and generates time-dependent coherent coupling. These results show that strong system-bath coupling can actively create excitonic states and the coherent manifold in which they evolve.

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

3 major / 2 minor

Summary. The manuscript uses femtosecond coherent multidimensional spectroscopy on lead-halide perovskite nanocrystals to claim that quantum back-action from a collective lattice-polarization field expands the excitonic Hilbert space in real time. An initial excitonic polarization X1 is prepared by the optical pulse; a second configuration X2 appears only after the polaron field develops, with coherent X1-X2 coupling emerging at later times. State formation and coherence formation are resolved as distinct stages. This is contrasted with CdSe quantum dots, where excitonic states and couplings are present at time zero. A dynamical polaron-field model is presented in which lattice polarization acts as an order parameter that expands the optically accessible manifold and generates time-dependent coherent coupling. The observed diagonal and anti-diagonal splittings increase with nanocrystal size and correlate with radiative oscillator strength.

Significance. If the central claim is substantiated by the data and controls, the result would challenge the standard hierarchy in which the excitonic Hamiltonian is fixed at photoexcitation and the lattice only renormalizes or dephases afterward. It would demonstrate that strong system-bath coupling can actively create new excitonic states and the coherent manifold in which they evolve, with implications for polaron physics in soft polar materials. The temporal separation of state emergence and coherence formation via multidimensional spectroscopy is a methodological strength.

major comments (3)
  1. [Results on time-dependent 2D spectra and spectral assignment] The central claim that X2 and X1-X2 coherence appear only after polaron formation (rather than as conventional phonon sidebands) rests on the spectral assignment in the multidimensional spectra. No side-by-side lineshape calculation is reported that demonstrates these features cannot be reproduced by a fixed excitonic Hamiltonian plus linear electron-phonon coupling with the same Huang-Rhys factor and phonon frequency.
  2. [Dynamical polaron-field model section] The dynamical polaron-field model is invoked to explain the expansion of the optically accessible manifold, but the manuscript does not state whether the model parameters (coupling strengths, frequencies, or order-parameter dynamics) are independently derived from material properties or fitted to the observed splittings and waiting-time evolution.
  3. [Experimental methods and controls] No control experiments (e.g., isotopic substitution, temperature series, or suppressed lattice polarization) are described that would exclude alternative interpretations such as standard Fröhlich sidebands, experimental artifacts, or post-selection effects in the multidimensional spectra.
minor comments (2)
  1. [Abstract] The abstract states the observation and model but supplies no quantitative error analysis, baseline comparisons, or statistical measures of the time-dependent features; these should be added to the main text for reproducibility.
  2. [Introduction and model] Notation for the excitonic configurations (X1, X2) and the polaron order parameter should be defined explicitly at first use with reference to the relevant equations.

Simulated Author's Rebuttal

3 responses · 0 unresolved

We thank the referee for the careful reading and constructive comments. We address each major point below and will revise the manuscript accordingly where appropriate.

read point-by-point responses

  1. Referee: [Results on time-dependent 2D spectra and spectral assignment] The central claim that X2 and X1-X2 coherence appear only after polaron formation (rather than as conventional phonon sidebands) rests on the spectral assignment in the multidimensional spectra. No side-by-side lineshape calculation is reported that demonstrates these features cannot be reproduced by a fixed excitonic Hamiltonian plus linear electron-phonon coupling with the same Huang-Rhys factor and phonon frequency.

    Authors: We agree that an explicit side-by-side comparison would strengthen the distinction from conventional phonon sidebands. In the revised manuscript we will add lineshape simulations of the waiting-time-dependent 2D spectra generated from a fixed excitonic Hamiltonian with linear electron-phonon coupling (using identical Huang-Rhys factor and phonon frequency). These calculations will show that the delayed emergence of the X2 diagonal peak and the growth of X1-X2 coherence cannot be reproduced without the dynamical expansion of the manifold. revision: yes

  2. Referee: [Dynamical polaron-field model section] The dynamical polaron-field model is invoked to explain the expansion of the optically accessible manifold, but the manuscript does not state whether the model parameters (coupling strengths, frequencies, or order-parameter dynamics) are independently derived from material properties or fitted to the observed splittings and waiting-time evolution.

    Authors: All parameters in the dynamical polaron-field model are taken from independent material properties: the Fröhlich coupling strength is computed from the measured static and high-frequency dielectric constants together with the electron and hole effective masses; the LO-phonon frequency is taken from Raman spectra on the same nanocrystals; and the order-parameter rise time is fixed by the independently measured polaron formation dynamics in lead-halide perovskites. We will add an explicit paragraph in the revised manuscript listing each parameter, its physical origin, and the numerical value employed. revision: yes

  3. Referee: [Experimental methods and controls] No control experiments (e.g., isotopic substitution, temperature series, or suppressed lattice polarization) are described that would exclude alternative interpretations such as standard Fröhlich sidebands, experimental artifacts, or post-selection effects in the multidimensional spectra.

    Authors: The comparison to CdSe quantum dots (weakly polar, same experimental conditions) already functions as a control showing that the delayed X2 feature and coherence are absent when lattice polarization is weak. The observed size dependence (increasing splitting with larger nanocrystals) and its correlation with radiative oscillator strength further discriminate against standard Fröhlich sidebands, which would show the opposite trend. We will expand the discussion section to explicitly address potential artifacts and post-selection effects using the existing data. Additional controls such as isotopic substitution lie beyond the present scope but could be pursued in follow-up work. revision: partial

Circularity Check

0 steps flagged

No significant circularity; claims rest on experimental spectral observations rather than self-referential definitions or fits.

full rationale

The paper reports time-resolved multidimensional spectra showing X1 prepared at t=0, X2 appearing later, and subsequent X1-X2 coherence, with size-dependent splittings opposite to quantum confinement and contrasted against CdSe. The dynamical polaron-field model is presented as a descriptive framework for these observations. No equations, self-citations, or parameter-fitting steps are quoted that reduce the central claim (Hilbert-space expansion via back-action) to a tautology or renamed input. The derivation chain is therefore self-contained, grounded in the reported spectral features and control comparison rather than circular construction.

Axiom & Free-Parameter Ledger

0 free parameters · 0 axioms · 0 invented entities

Abstract-only review supplies no explicit free parameters, axioms, or invented entities beyond the core claim; the polaron field is treated as a standard collective mode rather than a new postulated entity.

pith-pipeline@v0.9.1-grok · 5823 in / 1096 out tokens · 23896 ms · 2026-06-25T19:13:14.274803+00:00 · methodology

discussion (0)

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Reference graph

Works this paper leans on

87 extracted references · 10 canonical work pages

  1. [1]

    Introduction Excitations in solids are rarely bare particles. They are dressed by polarization fields, scattered by lattice mo- tion, stabilized by collective distortions, and sometimes transformed into quasiparticles whose identity cannot be assigned to the electronic system alone 1–10. Yet the standard description of quantum-confined semiconduc- tors us...

    Pith/arXiv arXiv 2026

  2. [2]

    exciton” and “envi- ronment

    Experimental observation of an evolving excitonic manifold Thespectrarevealanenergyscalethatdoesnotbelong to confinement. The diagonal and anti-diagonal split- tings are born at different times and measure different parts of the evolving Hamiltonian. The diagonal splitting appears when the lattice polarization has reorganized enough to define a new excito...

  3. [3]

    Transient diagonal and anti-diagonal projections in perovskite and CdSe quantum dots

    Lattice spectral density and polaron-field formation Figure 5shows that the decisive difference between CdSe and the perovskite quantum dots is not merely the 7 Figure 4. Transient diagonal and anti-diagonal projections in perovskite and CdSe quantum dots. (a) Time-resolved di- agonal projection for CsPbBr3. The D response appears af- ter excitation and r...

  4. [4]

    Before polaron formation, the optically active density matrix is effectively two- dimensional, ρ0X1(t) = (ρ00(t)ρ01(t) ρ10(t)ρ11(t) ) ,(7) corresponding to the basis{|0⟩,|X1⟩}

    Density-matrix model of delayed coherence formation The density-matrix formulation makes the Hilbert- space expansion explicit. Before polaron formation, the optically active density matrix is effectively two- dimensional, ρ0X1(t) = (ρ00(t)ρ01(t) ρ10(t)ρ11(t) ) ,(7) corresponding to the basis{|0⟩,|X1⟩}. AfterX2 is sta- bilized by the polaron field, the re...

  5. [5]

    wrong-way

    Size, composition, and radiative-rate scaling Figure 7tests the origin of the diagonal and anti- diagonal splittings by asking how they scale with nanocrystal edge length. The result is incompatible with ordinary quantum confinement11,81. Both splittings in- crease approximately linearly with edge length, whereas single-particle level spacings must decrea...

  6. [6]

    CdSe gives the conventional limit: the optical pulse interrogates confined excitons whose Hamiltonian is already present, while a weak, discrete phonon bath perturbs that spectrum

    Conclusions The central result of this work is that, in a soft polar semiconductor, the excitonic spectrum is not simply re- 13 vealed by light; it is assembled in time by quantum back- action between electronic polarization and lattice polar- ization. CdSe gives the conventional limit: the optical pulse interrogates confined excitons whose Hamiltonian is...

    2020

  7. [7]

    & Pekar, S

    Landau, L. & Pekar, S. Effective mass of a polaron.Zh. Eksp. Teor. Fiz18, 419-423 (1948)

    1948

  8. [8]

    Landau, L. D. Electron motion in crystal lattices.Phys. Z. Sowjet.3, 664 (1933)

    1933

  9. [9]

    Theory of electromagnetic waves in a crystal withexcitons.Journal of Physics and Chemistry of Solids 5, 11-22 (1958)

    Pekar, S. Theory of electromagnetic waves in a crystal withexcitons.Journal of Physics and Chemistry of Solids 5, 11-22 (1958)

    1958

  10. [10]

    Pekar, S.Localquantumstatesofelectronsinanidealion crystal.Zhurnal Eksperimentalnoi I Teoreticheskoi Fiziki 16, 341-348 (1946)

    1946

  11. [11]

    Electrons in lattice fields.Advances in Physics3, 325-361 (1954)

    Fröhlich, H. Electrons in lattice fields.Advances in Physics3, 325-361 (1954)

    1954

  12. [12]

    Studies of polaron motion: Part I

    Holstein, T. Studies of polaron motion: Part I. The molecular-crystal model.Annals of physics8, 325-342 (1959)

    1959

  13. [13]

    Electron-phonon interactions from first prin- ciples.Reviews of Modern Physics89, 015003 (2017)

    Giustino, F. Electron-phonon interactions from first prin- ciples.Reviews of Modern Physics89, 015003 (2017)

    2017

  14. [14]

    P., Mosconi, E., Jones, S

    Miyata, K., Meggiolaro, D., Tuan Trinh, M., Joshi, P. P., Mosconi, E., Jones, S. C., De Angelis, F. & Zhu, X. Y. Large Polarons in Lead Halide Perovskites.Sci. Adv.3, e1701217 (2017)

    2017

  15. [15]

    Miyata, K., Atallah, T. L. & Zhu, X. Y. Lead Halide Perovskites: Crystal-Liquid Duality, Phonon Glass Elec- tron Crystals, and Large Polaron Formation.Sci. Adv.3, e1701469 (2017)

    2017

  16. [16]

    N., Nazarenko, O., De Gennaro, R., Gatti, G., Roth, S., Barillot, T., Poletto, L., Xian, R

    Puppin, M., Polishchuk, S., Colonna, N., Crepaldi, A., Dirin, D. N., Nazarenko, O., De Gennaro, R., Gatti, G., Roth, S., Barillot, T., Poletto, L., Xian, R. P., Rettig, L., Wolf, M., Ernstorfer, R., Kovalenko, M. V., Marzari, N., Grioni, M. & Chergui, M. Evidence of large polarons in photoemission band mapping of the perovskite semicon- ductor CsPbBr3.Phy...

    2020

  17. [17]

    Efros, A.L.&Rosen, M.Theelectronicstructureofsemi- conductor nanocrystals.Annual Review of Materials Sci- ence30, 475-521 (2000)

    2000

  18. [18]

    J., Efros, A

    Norris, D. J., Efros, A. L., Rosen, M. & Bawendi, M. G. Size dependence of exciton fine structure in CdSe quan- tum dots.Phys. Rev. B: Condens. Matter Mater. Phys. 53, 16347 (1996)

    1996

  19. [19]

    L., Rosen, M., Kuno, M., Nirmal, M., Norris, D

    Efros, A. L., Rosen, M., Kuno, M., Nirmal, M., Norris, D. J. & Bawendi, M. G. Band-Edge Exciton in Quantum Dots if Semiconductors with a Degenarate Valence Band: Dark and Bright Exciton States.Phys. Rev. B: Condens. Matter Mater. Phys.54, 4843 (1996)

    1996

  20. [20]

    Dark Ex- citon

    Nirmal, M., Norris, D. J., Kuno, M., Bawendi, M. G., Efros, A. L. & Rosen, M. Observation of the “Dark Ex- citon” in CdSe Quantum Dots.Phys. Rev. Lett.75, 3728 (1995)

    1995

  21. [21]

    & Zunger, A

    Bester, G., Nair, S. & Zunger, A. Pseudopotential cal- culation of the excitonic fine structure of million-atom self-assembled In 1- x Ga x A s/G a A s quantum dots. Phys. Rev. B: Condens. Matter Mater. Phys.67, 161306 (2003)

    2003

  22. [22]

    High-energy excitonic transitions in CdSe quantum dots.The Journal of Physical Chemistry B102, 6449-6454 (1998)

    Wang & Zunger, A. High-energy excitonic transitions in CdSe quantum dots.The Journal of Physical Chemistry B102, 6449-6454 (1998)

    1998

  23. [23]

    & Zunger, A

    Fu, H., Wang, L.-W. & Zunger, A. Applicability of the k·p method to the electronic structure of quantum dots. Phys. Rev. B57, 9971 (1998)

    1998

  24. [24]

    & Zunger, A

    Wang, L.-W. & Zunger, A. Pseudopotential calculations of nanoscale CdSe quantum dots.Phys. Rev. B53, 9579- 9582 (1996).https://doi.org/10.1103/PhysRevB.53. 9579

    work page doi:10.1103/physrevb.53 1996

  25. [25]

    J., Rabani, E

    Ghosh, A., Peng, K., Brosseau, P. J., Rabani, E. & Kambhampati, P. Atomistically resolved hot exciton re- laxation dynamics in CdSe quantum dots: Experiment 14 and theory.The Journal of Chemical Physics163(2025)

    2025

  26. [26]

    & Rabani, E

    Jasrasaria, D. & Rabani, E. Circumventing the phonon bottleneck by multiphonon-mediated hot exciton cool- ing at the nanoscale.npj Computational Materials9, 145 (2023).https://doi.org/10.1038/s41524-023-01102 -8

    work page doi:10.1038/s41524-023-01102 2023

  27. [27]

    J., Geuchies, J

    Brosseau, P. J., Geuchies, J. J., Jasrasaria, D., Houte- pen, A. J., Rabani, E. & Kambhampati, P. Ultra- fast hole relaxation dynamics in quantum dots revealed by two-dimensional electronic spectroscopy.Communica- tions Physics6, 48 (2023)

    2023

  28. [28]

    & Rabani, E

    Jasrasaria, D. & Rabani, E. Interplay of surface and inte- rior modes in exciton–phonon coupling at the nanoscale. Nano Lett.21, 8741-8748 (2021)

    2021

  29. [29]

    L., Jasrasaria, D., Philbin, J

    Guzelturk, B., Cotts, B. L., Jasrasaria, D., Philbin, J. P., Hanifi, D. A., Koscher, B. A., Balan, A. D., Curling, E., Zajac, M., Park, S., Yazdani, N., Nyby, C., Kamys- bayev, V., Fischer, S., Nett, Z., Shen, X., Kozina, M. E., Lin, M.-F., Reid, A. H., Weathersby, S. P., Schaller, R. D., Wood, V., Wang, X., Dionne, J. A., Talapin, D. V., Alivisatos, A. P...

    work page doi:10.1038/s41467-021-2 2021

  30. [30]

    Philbin, J. P. & Rabani, E. Electron–Hole Correlations Govern Auger Recombination in Nanostructures.Nano Lett.18, 7889-7895 (2018).https://doi.org/10.1021/ acs.nanolett.8b03715

    2018

  31. [31]

    Com- mun.10, 4962 (2019)

    Seiler, H., Palato, S., Sonnichsen, C., Baker, H., Socie, E., Strandell, D.P.&Kambhampati, P.Two-dimensional electronic spectroscopy reveals liquid-like lineshape dy- namics in CsPbI3 perovskite nanocrystals.Nat. Com- mun.10, 4962 (2019)

    2019

  32. [32]

    & Kambhampati, P

    Brosseau, P., Ghosh, A., Seiler, H., Strandell, D. & Kambhampati, P. Exciton–polaron interactions in metal halide perovskite nanocrystals revealed via two- dimensional electronic spectroscopy.The Journal of Chemical Physics159(2023)

    2023

  33. [33]

    N., Kovalenko, M

    Ghosh, A., Palato, S., Brosseau, P., Tao, R., Dirin, D. N., Kovalenko, M. V. & Kambhampati, P. Coherent Multi- Dimensional Spectroscopy Reveals Homogeneous Line- shape Dynamics in CsPbBr3 Quantum Dots.ACS Nano 19, 26843-26851 (2025)

    2025

  34. [34]

    N., Prezhdo, O

    Ghosh, A., Mora Perez, C., Brosseau, P., Dirin, D. N., Prezhdo, O. V., Kovalenko, M. V. & Kambhampati, P. Coherent Multidimensional Spectroscopy Reveals Hot Exciton Cooling Landscapes in CsPbBr3 Quantum Dots. ACS Nano19, 14499-14508 (2025)

    2025

  35. [35]

    C., Brosseau, P., Dirin, D

    Ghosh, A., Liu, A., Boehme, S. C., Brosseau, P., Dirin, D. N., Kovalenko, M. V. & Kambhampati, P. Correlated Lattice Fluctuations in CsPbBr3 Quantum Dots Give Rise to Long-Lived Electronic Coherence.ACS Nano19, 19927-19937 (2025)

    2025

  36. [36]

    & Kamb- hampati, P

    Nagpal, P., Ghosh, A., Seiler, H., Palato, S. & Kamb- hampati, P. Real-Time Formation of a Landau Polaron. arXiv preprint arXiv:2602.24113(2026)

    arXiv 2026

  37. [37]

    & Zhu, X

    Miyata, K. & Zhu, X. Y. Ferroelectric large polarons. Nat. Mater.17, 379 (2018)

    2018

  38. [38]

    X., Tan, L

    Wu, X. X., Tan, L. Z., Shen, X. Z., Hu, T., Miyata, K., Trinh, M. T., Li, R. K., Coffee, R., Liu, S., Egger, D. A., Makasyuk, I., Zheng, Q., Fry, A., Robinson, J. S., Smith, M. D., Guzelturk, B., Karunadasa, H. I., Wang, X. J., Zhu, X. Y., Kronik, L., Rappe, A. M. & Lindenberg, A. M. Light-induced picosecond rotational disordering of the inorganic sublatt...

    2017

  39. [39]

    S., Yaffe, O., Hull, T

    Guo, Y. S., Yaffe, O., Hull, T. D., Owen, J. S., Reichman, D. R. & Brus, L. E. Dynamic emission Stokes shift and liquid-like dielectric solvation of band edge carriers in lead-halide perovskites.Nat. Commun.10, 1175 (2019)

    2019

  40. [40]

    S., Tan, L

    Yaffe, O., Guo, Y. S., Tan, L. Z., Egger, D. A., Hull, T., Stoumpos, C. C., Zheng, F., Heinz, T. F., Kronik, L., Kanatzidis, M. G., Owen, J. S., Rappe, A. M., Pimenta, M. A. & Brus, L. E. Local Polar Fluctuations in Lead Halide Perovskite Crystals.Phys. Rev. Lett.118, 136001 (2017)

    2017

  41. [41]

    J., Valverde-Chavez, D

    Lan, Y., Dringoli, B. J., Valverde-Chavez, D. A., Pon- seca, C. S., Sutton, M., He, Y. H., Kanatzidis, M. G. & Cooke, D. G. Ultrafast correlated charge and lattice motion in a hybrid metal halide perovskite.Science Ad- vances5, eaaw5558 (2019)

    2019

  42. [42]

    P., Maehrlein, S

    Joshi, P. P., Maehrlein, S. F. & Zhu, X. Y. Dynamic Screening and Slow Cooling of Hot Carriers in Lead Halide Perovskites.Adv. Mater.31, 1803054 (2019)

    2019

  43. [43]

    J., Bhaumik, S., Goh, T

    Li, M. J., Bhaumik, S., Goh, T. W., Kumar, M. S., Yan- tara, N., Gratzel, M., Mhaisalkar, S., Mathews, N. & Sum, T. C. Slow Cooling and Highly Efficient Extraction ofHotCarriersinColloidalPerovskiteNanocrystals.Nat. Commun.8, 14350 (2017)

    2017

  44. [44]

    Fu, J., Xu, Q., Han, G., Wu, B., Huan, C. H. A., Leek, M. L. & Sum, T. C. Hot carrier cooling mechanisms in halide perovskites.Nat. Commun.8, 1-9 (2017)

    2017

  45. [45]

    Chu, W., Zheng, Q., Prezhdo, O.V., Zhao, J.&Saidi, W. A. Low-frequency lattice phonons in halide perovskites explain high defect tolerance toward electron-hole recom- bination.Science advances6, eaaw7453 (2020)

    2020

  46. [46]

    & Zunger, A

    Walsh, A. & Zunger, A. Instilling Defect Tolerance in New Compounds.Nat. Mater.16, 964 (2017)

    2017

  47. [47]

    I., Kershaw, S

    Huang, H., Bodnarchuk, M. I., Kershaw, S. V., Ko- valenko, M. V. & Rogach, A. L. Lead halide perovskite nanocrystals in the research spotlight: stability and de- fect tolerance.ACS energy letters2, 2071-2083 (2017)

    2071

  48. [48]

    Unraveling the excitonics of light emission from metal-halide perovskite quantum dots

    Kambhampati, P. Unraveling the excitonics of light emission from metal-halide perovskite quantum dots. Nanoscale16, 15033-15058 (2024)

    2024

  49. [49]

    Strandell, D. P. & Kambhampati, P. Light Emission from CsPbBr3 Metal Halide Perovskite Nanocrystals Arises from Dual Emitting States with Distinct Lattice Cou- plings.Nano Lett.23, 11330-11336 (2023)

    2023

  50. [50]

    Strandell, D. P. & Kambhampati, P. Observing strongly confined multiexcitons in bulk-like CsPbBr3 nanocrys- tals.The Journal of Chemical Physics158, 094706 (2023)

    2023

  51. [51]

    Strandell, D., Dirin, D., Zenatti, D., Nagpal, P., Ghosh, A., Raino, G., Kovalenko, M. V. & Kambhampati, P. Enhancing Multiexcitonic Emission in Metal-Halide Per- ovskites by Quantum Confinement.ACS Nano17, 24910 (2023)

    2023

  52. [52]

    & Kambhampati, P

    Strandell, D., Wu, Y., Prezhdo, O. & Kambhampati, P. Excitonic Quantum Coherence in Light Emission from CsPbBr 3 Metal-Halide Perovskite Nanocrystals.Nano Lett.24, 61 (2023)

    2023

  53. [53]

    C., Feld, L

    Zhu, C., Boehme, S. C., Feld, L. G., Moskalenko, A., Dirin, D. N., Mahrt, R. F., Stöferle, T., Bodnarchuk, M. I., Efros, A. L. & Sercel, P. C. Single-photon superra- diance in individual caesium lead halide quantum dots. Nature626, 535-541 (2024). 15

    2024

  54. [54]

    & Giustino, F

    Dai, Z., Lian, C., Lafuente-Bartolome, J. & Giustino, F. Theory of excitonic polarons: From models to first- principles calculations.Phys. Rev. B109, 045202 (2024)

    2024

  55. [55]

    L., Caruso, F

    Britt, T. L., Caruso, F. & Siwick, B. J. A momentum- resolvedviewofpolaronformationinmaterials.npj Com- putational Materials10, 178 (2024)

    2024

  56. [56]

    F., Seferos, D

    Biswas, S., Zhao, R., Alowa, F., Zacharias, M., Shar- ifzadeh, S., Coker, D. F., Seferos, D. S. & Scholes, G. D. Exciton polaron formation and hot-carrier relaxation in rigid Dion–Jacobson-type two-dimensional perovskites. Nature Materials, 1-7 (2024)

    2024

  57. [57]

    Yue, X., Wang, C., Zhang, B., Zhang, Z., Xiong, Z., Zu, X., Liu, Z., Hu, Z., Odunmbaku, G. O. & Zheng, Y. Real- time observation of the buildup of polaron inα-FAPbI3. Nat. Commun.14, 917 (2023)

    2023

  58. [58]

    C., Bodnarchuk, M

    Seiler, H., Zahn, D., Taylor, V. C., Bodnarchuk, M. I., Windsor, Y. W., Kovalenko, M. V. & Ernstorfer, R. Direct observation of ultrafast lattice distortions dur- ing exciton–polaron formation in lead halide perovskite nanocrystals.ACS Nano17, 1979-1988 (2023)

    1979

  59. [59]

    D., Strandell, D

    Sonnichsen, C. D., Strandell, D. P., Brosseau, P. J. & Kambhampati, P. Polaronic quantum confinement in bulk $\mathrm{CsPb}{\mathrm{Br}}_{3}$ perovskite crystals revealed by state-resolved pump/probe spec- troscopy.Physical Review Research3, 023147 (2021). https://doi.org/10.1103/PhysRevResearch.3.023147

    work page doi:10.1103/physrevresearch.3.023147 2021

  60. [60]

    Guzelturk, B., Winkler, T., Van de Goor, T. W. J., Smith, M. D., Bourelle, S. A., Feldmann, S., Trigo, M., Teitelbaum, S. W., Steinrück, H. G., de la Pena, G. A., Alonso-Mori, R., Zhu, D., Sato, T., Karunadasa, H. I., Toney, M. F., Deschler, F. & Lindenberg, A. M. Visual- ization of dynamic polaronic strain fields in hybrid lead halide perovskites.Nat. Ma...

    2021

  61. [61]

    & Diebold, U

    Franchini, C., Reticcioli, M., Setvin, M. & Diebold, U. Polarons in materials.Nature Reviews Materials6, 560- 586 (2021)

    2021

  62. [62]

    Thouin, F., Valverde-Chávez, D. A., Quarti, C., Cortec- chia, D., Bargigia, I., Beljonne, D., Petrozza, A., Silva, C.&SrimathKandada, A.R.PhononCoherencesReveal the Polaronic Character of Excitons in Two-Dimensional Lead Halide Perovskites.Nat. Mater.18, 349 (2019)

    2019

  63. [63]

    Cinquanta, E., Meggiolaro, D., Motti, S.G., Gandini, M., Alcocer, M. J. P., Akkerman, Q. A., Vozzi, C., Manna, L., De Angelis, F. & Petrozza, A. Ultrafast THz Probe of PhotoinducedPolaronsinLead-HalidePerovskites.Phys. Rev. Lett.122, 166601 (2019)

    2019

  64. [64]

    A., Ivanov, I., Wang, H

    Bretschneider, S. A., Ivanov, I., Wang, H. I., Miyata, K., Zhu, X. Y. & Bonn, M. Quantifying Polaron Formation and Charge Carrier Cooling in Lead-Iodide Perovskites. Adv. Mater.30, 1707312 (2018)

    2018

  65. [65]

    K., Bladt, E., Kshirsagar, A

    Dey, A., Ye, J., De, A., Debroye, E., Ha, S. K., Bladt, E., Kshirsagar, A. S., Wang, Z., Yin, J., Wang, Y., Quan, L. N., Yan, F., Gao, M., Li, X., Shamsi, J., Debnath, T., Cao, M., Scheel, M. A., Kumar, S., Steele, J. A., Gerhard, M., Chouhan, L., Xu, K., Wu, X.-g., Li, Y., Zhang, Y., Dutta, A., Han, C., Vincon, I., Rogach, A. L., Nag, A., Samanta, A., Ko...

    work page doi:10.1021/acsnano.0c08903 2021

  66. [66]

    Genesis, Challenges and Opportunities for Colloidal Lead Halide Perovskite Nanocrystals.Nat

    Akkerman, Q.A., Rainò, G., Kovalenko, M.V.&Manna, L. Genesis, Challenges and Opportunities for Colloidal Lead Halide Perovskite Nanocrystals.Nat. Mater.17, 394 (2018)

    2018

  67. [67]

    V., Protesescu, L

    Kovalenko, M. V., Protesescu, L. & Bodnarchuk, M. I. Properties and Potential Optoelectronic Applications of Lead Halide Perovskite Nanocrystals.Science358, 745 (2017)

    2017

  68. [68]

    A., Nguyen, T

    Akkerman, Q. A., Nguyen, T. P., Boehme, S. C., Mon- tanarella, F., Dirin, D. N., Wechsler, P., Beiglböck, F., Rainò, G., Erni, R. & Katan, C. Controlling the nucle- ation and growth kinetics of lead halide perovskite quan- tum dots.Science377, 1406-1412 (2022)

    2022

  69. [69]

    M., Cooney, R

    Sagar, D. M., Cooney, R. R., Sewall, S. L., Dias, E. A., Barsan, M. M., Butler, I. S. & Kambhampati, P. Size dependent, state-resolved studies of exciton-phonon couplings in strongly confined semiconductor quantum dots.Phys. Rev. B: Condens. Matter Mater. Phys.77, 14235321 (2008)

    2008

  70. [70]

    D., Strandell, D

    Sonnichsen, C. D., Strandell, D. P., Brosseau, P. J. & Kambhampati, P. Polaronic quantum confinement in bulk CsPbBr3 perovskite crystals revealed by state- resolved pump/probe spectroscopy.Physical Review Re- search3, 023147 (2021)

    2021

  71. [71]

    Kambhampati, P. Learning about the Structural Dynam- ics of Semiconductor Perovskites from Electron Solvation Dynamics.The Journal of Physical Chemistry C125, 23571-23586 (2021).https://doi.org/10.1021/acs.jp cc.1c07445

    work page doi:10.1021/acs.jp 2021

  72. [72]

    & Cun- diff, S.Optical Multidimensional Coherent Spectroscopy

    Li, H., Lomsadze, B., Moody, G., Smallwood, C. & Cun- diff, S.Optical Multidimensional Coherent Spectroscopy. (Oxford University Press, 2023)

    2023

  73. [73]

    & Hamm, P.Concepts and Methods of 2D In- frared Spectroscopy

    Zanni, M. & Hamm, P.Concepts and Methods of 2D In- frared Spectroscopy. (Cambridge University Press, 2011)

    2011

  74. [74]

    V., Shen, Q., Bellora, C

    Fresch, E., Camargo, F. V., Shen, Q., Bellora, C. C., Pullerits, T., Engel, G. S., Cerullo, G. & Collini, E. Two-dimensionalelectronicspectroscopy.Nature Reviews Methods Primers3, 84 (2023)

    2023

  75. [75]

    & Scholes, G

    Biswas, S., Kim, J., Zhang, X. & Scholes, G. D. Coher- ent two-dimensional and broadband electronic spectro- scopies.Chemical Reviews122, 4257-4321 (2022)

    2022

  76. [76]

    & Kambhampati, P

    Sonnichsen, C., Brosseau, P., Reid, C. & Kambhampati, P. OPA-driven hollow-core fiber as a tunable, broadband source for coherent multidimensional spectroscopy.Op- tics Express29, 28352-28358 (2021).https://doi.org/ 10.1364/OE.431988

    work page doi:10.1364/oe.431988 2021

  77. [77]

    & Kambhampati, P

    Palato, S., Seiler, H., Baker, H., Sonnichsen, C., Zifkin, R., McGowanIV, J. & Kambhampati, P. An analysis of hollow-corefiberforapplicationsincoherentfemtosecond spectroscopies.J. Appl. Phys.128, 103107 (2020).http s://doi.org/10.1063/1.5113691

    work page doi:10.1063/1.5113691 2020

  78. [78]

    Seiler, H., Palato, S., Schmidt, B. E. & Kambhampati, P. Simple fiber-based solution for coherent multidimen- sional spectroscopy in the visible regime.Opt. Lett.42, 643 (2017)

    2017

  79. [79]

    & Kambhampati, P

    Seiler, H., Walsh, B., Palato, S., Thai, A., Crozatier, V., Forget, N. & Kambhampati, P. Kilohertz generation of high contrast polarization states for visible femtosecond pulses via phase-locked acousto-optic pulse shapers.J. 16 Appl. Phys.118, 103110 (2015)

    2015

  80. [80]

    & Kamb- hampati, P

    Palato, S., Seiler, H., Nijjar, P., Prezhdo, O. & Kamb- hampati, P. Atomic fluctuations in electronic materials revealed by dephasing.Proc. Natl. Acad. Sci. U. S. A. 117, 11940 (2020)

    2020

Showing first 80 references.