scholarly journals Determining the electron-phonon coupling in superconducting cuprates by resonant inelastic x-ray scattering: Methods and results on Nd1+xBa2−xCu3O7−δ

2020 ◽  
Vol 2 (2) ◽  
Author(s):  
Lucio Braicovich ◽  
Matteo Rossi ◽  
Roberto Fumagalli ◽  
Yingying Peng ◽  
Yan Wang ◽  
...  
Keyword(s):  
Phonon Coupling ◽  
Superconducting Cuprates ◽  
X Ray ◽  
X Ray Scattering ◽  
Electron Phonon Coupling ◽  
Ray Scattering

scholarly journals Resonant inelastic x-ray scattering probes the electron-phonon coupling in the spin liquid κ -(BEDT-TTF) 2Cu2(CN)3

2017 ◽  
Vol 96 (18) ◽  
Author(s):  
V. Ilakovac ◽  
S. Carniato ◽  
P. Foury-Leylekian ◽  
S. Tomić ◽  
J.-P. Pouget ◽  
...  
Keyword(s):  
Spin Liquid ◽  
Phonon Coupling ◽  
X Ray ◽  
X Ray Scattering ◽  
Electron Phonon Coupling ◽  
Ray Scattering

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

2019 ◽  
Vol 100 (22) ◽  
Author(s):  
J. G. Vale ◽  
C. D. Dashwood ◽  
E. Paris ◽  
L. S. I. Veiga ◽  
M. Garcia-Fernandez ◽  
...  
Keyword(s):  
High Resolution ◽  
Phonon Coupling ◽  
X Ray ◽  
X Ray Scattering ◽  
Electron Phonon Coupling ◽  
Scattering Study ◽  
Ray Scattering

scholarly journals Collective Nature of Spin Excitations in Superconducting Cuprates Probed by Resonant Inelastic X-Ray Scattering

2015 ◽  
Vol 114 (21) ◽  
Author(s):  
M. Minola ◽  
G. Dellea ◽  
H. Gretarsson ◽  
Y. Y. Peng ◽  
Y. Lu ◽  
...  
Keyword(s):  
Superconducting Cuprates ◽  
X Ray ◽  
X Ray Scattering ◽  
Spin Excitations ◽  
Ray Scattering

scholarly journals Beyond the single-site approximation modeling of electron-phonon coupling effects on resonant inelastic X-ray scattering spectra

2021 ◽  
Vol 11 (3) ◽  
Author(s):  
Krzysztof Bieniasz ◽  
Steven Johnston ◽  
Mona Berciu
Keyword(s):  
Theoretical Work ◽  
Local Approximation ◽  
Variational Approximation ◽  
X Ray ◽  
X Ray Scattering ◽  
Electron Phonon Coupling ◽  
Improper Use ◽  
Scattering Spectra ◽  
Ray Scattering

Resonant inelastic X-ray scattering (RIXS) is used increasingly for characterizing low-energy collective excitations in materials. RIXS is a powerful probe, which often requires sophisticated theoretical descriptions to interpret the data. In particular, the need for accurate theories describing the influence of electron-phonon (e-p) coupling on RIXS spectra is becoming timely, as instrument resolution improves and this energy regime is rapidly becoming accessible. To date, only rather exploratory theoretical work has been carried out for such problems. We begin to bridge this gap by proposing a versatile variational approximation for calculating RIXS spectra in weakly doped materials, for a variety of models with diverse e-p couplings. Here, we illustrate some of its potential by studying the role of electron mobility, which is completely neglected in the widely used local approximation based on Lang-Firsov theory. Assuming that the e-p coupling is of the simplest, Holstein type, we discuss the regimes where the local approximation fails, and demonstrate that its improper use may grossly underestimate the e-p coupling strength.

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