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… 

Figures from this paper

Beyond single-site approximation modelling of electron-phonon coupling in resonant inelastic X-ray scattering
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
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$_{7-\delta}$
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.
TLDR
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
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 +
Probing light-driven quantum materials with ultrafast resonant inelastic X-ray scattering
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.
TLDR
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”
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.
Catalogue of phonon modes in several cuprate high-temperature superconductors from density functional theory
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
TLDR
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.
...
1
2
3
...

References

SHOWING 1-10 OF 124 REFERENCES
Determining the electron-phonon coupling strength from Resonant Inelastic X-ray Scattering at transition metal L-edges
We show that high-resolution Resonant Inelastic X-ray Scattering (RIXS) provides direct, element-specific and momentum-resolved information on the electron-phonon (e-p) coupling strength. Our
Hybridization and electron-phonon coupling in ferroelectric BaTiO 3 probed by resonant inelastic x-ray scattering
We investigated the ferroelectric perovskite material BaTiO3 by resonant inelastic x-ray scattering (RIXS) at the Ti L-3 edge. We observe with decreasing temperature a transfer of spectral weight
Decoupling Carrier Concentration and Electron-Phonon Coupling in Oxide Heterostructures Observed with Resonant Inelastic X-Ray Scattering.
TLDR
This work both showcases a feasible method to extract the electron-phonon coupling in superlattices and unveils a potential route for tuning this coupling, which is often associated with superconductivity in SrTiO_{3}-based systems.
Electron–phonon coupling effects explored by inelastic neutron scattering
This article gives a summary of inelastic neutron scattering studies searching for signatures of a strong electron–phonon coupling in high temperature superconductors. Special emphasis is laid on the
Demonstration of resonant inelastic x-ray scattering as a probe of exciton-phonon coupling
Resonant inelastic X-ray scattering (RIXS) is a promising technique for obtaining electron-phonon coupling constants. However, the ability to extract these coupling constants throughout the Brillouin
Electron-phonon coupling in high-temperature cuprate superconductors determined from electron relaxation rates.
TLDR
Electronic relaxation times via pump-probe optical spectroscopy using sub-15 fs pulses for the normal state of two different cuprate superconductors suggest a possible fundamental role of the electron-phonon interaction in the superconducting pairing mechanism.
Phonon dispersion and electron-phonon interaction for YBa2Cu3O7 from first-principles calculations
We present a first-principles investigation of the lattice dynamics and electron-phonon coupling of the high-Tc superconductor YBa2Cu3O7 within the framework of density functional perturbation theory
Electron-Phonon Coupling in the Bulk of Anatase TiO2 Measured by Resonant Inelastic X-Ray Spectroscopy.
TLDR
The polaronic ground state of anatase TiO2 is investigated by bulk-sensitive resonant inelastic x-ray spectroscopy (RIXS) at the Ti L3 edge and RIXS is established as a directional bulk- sensitive probe of electron-phonon coupling in solids.
Role of the electron-phonon interaction in the strongly correlated cuprate superconductors
Abstract Using high-resolution angle-resolved photoemission data in conjunction with that from neutron and other probes, we show that electron-phonon coupling is strong in cuprate superconductors and
Collective nature of spin excitations in superconducting cuprates probed by resonant inelastic X-ray scattering.
TLDR
These findings demonstrate that the largest fraction of the spin-flip RIXS profiles in doped cuprates arises from magnetic collective modes, rather than from incoherent particle-hole excitations as recently suggested theoretically.
...
1
2
3
4
5
...