# Experimental Determination of Momentum-Resolved Electron-Phonon Coupling.

@article{Rossi2019ExperimentalDO, title={Experimental Determination of Momentum-Resolved Electron-Phonon Coupling.}, author={Matteo Rossi and Riccardo Arpaia and Roberto Fumagalli and Marco Moretti Sala and Davide Betto and Kurt Kummer and G. M. De Luca and Jeroen van den Brink and Marco Salluzzo and Nicholas B. Brookes and Lucio Braicovich and Giacomo Ghiringhelli}, journal={Physical review letters}, year={2019}, volume={123 2}, pages={ 027001 } }

We provide a novel experimental method to quantitatively estimate the electron-phonon coupling and its momentum dependence from resonant inelastic x-ray scattering (RIXS) spectra based on the detuning of the incident photon energy away from an absorption resonance. We apply it to the cuprate parent compound NdBa_{2}Cu_{3}O_{6} and find that the electronic coupling to the oxygen half-breathing phonon branch is strongest at the Brillouin zone boundary, where it amounts to ∼0.17 eV, in agreement…

## 28 Citations

Beyond single-site approximation modelling of electron-phonon coupling in resonant inelastic X-ray scattering

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- 2021

Resonant inelastic X-ray scattering (RIXS) is used increasingly for characterizing lowenergy collective excitations in materials. RIXS is a powerful probe, which often requires sophisticated…

High-resolution resonant inelastic x-ray scattering study of the electron-phonon coupling in honeycomb
α−Li2IrO3

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- 2019

The excitations in honeycomb $\alpha$-Li$_2$IrO$_3$ have been investigated with high-resolution resonant inelastic x-ray scattering (RIXS) at the O K edge. The low-energy response is dominated by a…

Determining the Electron-Phonon Coupling in Superconducting Cuprates by Resonant Inelastic X-ray Scattering: Methods and Results on Nd$_{1+x}$Ba$_{2-x}$Cu$_3$O$_{7-\delta}$

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- 2019

The coupling between lattice vibration quanta and valence electrons can induce charge density modulations and decisively influence the transport properties of materials, e.g. leading to conventional…

Strongly Correlated Charge Density Wave in La_{2-x}Sr_{x}CuO_{4} Evidenced by Doping-Dependent Phonon Anomaly.

- PhysicsPhysical review letters
- 2020

A comprehensive resonant inelastic x-ray scattering study of La_{2-x}Sr_{x}CuO_{4} finds that charge-density wave effects persist up to a remarkably high doping level before disappearing at x=0.25, indicating that the spectra contain little or no direct coupling to electronic excitations near the Fermi surface.

LDA+DMFTapproach to resonant inelastic x-ray scattering in correlated materials

- PhysicsPhysical Review B
- 2020

We present a computational study of $L$-edge resonant inelastic x-ray scattering (RIXS) in correlated 3$d$ transition-metal oxides using an $ab$ $initio$ method based on local density approximation +…

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Ultrafast optical pulses are an increasingly important tool for controlling quantum materials and triggering novel photo-induced phase transitions. Understanding these dynamic phenomena requires a…

TD-DFT simulations of K-edge resonant inelastic X-ray scattering within the restricted subspace approximation.

- PhysicsPhysical chemistry chemical physics : PCCP
- 2020

A scheme for simulations of resonant inelastic X-ray scattering (RIXS) cross-sections within time-dependent density functional theory (TD-DFT) applying the restricted subspace approximation (RSA) is presented, which yields a consistent description of all states contributing to the RIXS scattering process within a single calculation.

Supplemental Material for “Probing electron-phonon interactions away from the Fermi level with resonant inelastic x-ray scattering”

- 2021

C. D. Dashwood, ∗ A. Geondzhian, 3, † J. G. Vale, A. C. Pakpour-Tabrizi, C. A. Howard, Q. Faure, L. S. I. Veiga, D. Meyers, 6 S. G. Chiuzbăian, 8 A. Nicolaou, N. Jaouen, R. B. Jackman, A. Nag, M.…

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Cuprates are promising candidates for study in developing higher temperature superconductors. A thorough understanding of a material's phonon modes enables further investigation of its emergent…

Multiorbital charge-density wave excitations and concomitant phonon anomalies in Bi2Sr2LaCuO6+δ

- PhysicsProceedings of the National Academy of Sciences
- 2020

This work investigates underdoped Bi2Sr1.4La0.6CuO6+δ using resonant inelastic X-ray scattering (RIXS) and finds that a short-range CDW exists at both Cu and O sublattices in the copper-oxide planes with a comparable periodicity and correlation length and uncovers bond-stretching and bond-buckling phonon anomalies concomitant to the CDWs.

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