Electron-phonon interaction and its manifestation in high-temperature superconductors

1995 ◽  
Vol 8 (4) ◽  
pp. 433-435 ◽  
Author(s):  
E. G. Maksimov
Keyword(s):  
High Temperature ◽  
High Temperature Superconductors ◽  
Phonon Interaction ◽  
Electron Phonon Interaction

scholarly journals The Gap and the Upper Critical FieldHc2as Function of Doping for High-TcCuprates

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
S. Orozco ◽  
R. M. Méndez-Moreno ◽  
M. A. Ortiz
Keyword(s):  
High Temperature ◽  
Critical Field ◽  
Energy Gap ◽  
High Temperature Superconductors ◽  
Upper Critical Field ◽  
Superconducting Gap ◽  
Phonon Interaction ◽  
As Doping ◽  
Electron Phonon Interaction ◽  
Wave Symmetry

The relation between thed-wave superconducting gapΔ0and the specific heat obtained with the Volovik effect is used to determine the upper critical fieldHc2as doping function, for high-temperature superconductors. A two-components model withd-wave symmetry, within the BCS framework, is introduced to describe the superconducting state. Generalized Fermi surface topologies are used in order to increase the density of states at the Fermi level, allowing the high-Tcvalues observed. The electron-phonon interaction is considered the most relevant mechanism for the high-Tccuprates, where the available phonon energy is provided by the half-breathing modes. The energy gap valuesΔ0calculated with this model are introduced to describe the variation of the upper critical fieldHc2as function of doping, forLa2-xSrxCuO4.

Electron-phonon interaction in high-temperature superconductors

1993 ◽  
Vol 163 (2) ◽  
pp. 61 ◽  
Author(s):  
V.M. Svistunov ◽  
M.B. Belogolovskii ◽  
A.I. Khachaturov
Keyword(s):  
High Temperature ◽  
High Temperature Superconductors ◽  
Phonon Interaction ◽  
Electron Phonon Interaction

Electron-phonon interaction in high-temperature superconductors

1993 ◽  
Vol 36 (2) ◽  
pp. 65-80 ◽  
Author(s):  
V M Svistunov ◽  
M A Belogolovskiĭ ◽  
A I Khachaturov
Keyword(s):  
High Temperature ◽  
High Temperature Superconductors ◽  
Phonon Interaction ◽  
Electron Phonon Interaction

scholarly journals Fermi blockade of the strong electron-phonon interaction in optimally doped high temperature superconductors

2021 ◽  
Author(s):  
Andrey Mishchenko ◽  
Naoto Nagaosa ◽  
Nikolay Prokof'ev ◽  
Igor Tupitsyn
Keyword(s):  
High Temperature ◽  
High Temperature Superconductors ◽  
Two Dimensional ◽  
Phonon Interaction ◽  
Strong Electron ◽  
Electron Phonon Interaction ◽  
Holstein Model ◽  
Bold Line ◽  
Spin Polarized ◽  
Migdal's Theorem

Abstract We study how manifestations of strong electron-phonon interaction (EPI) depend on the carrier concentration by solving the two-dimensional Holstein model for the spin-polarized fermions using an approximation free bold-line diagrammatic Monte Carlo (BDMC) method. We show that the strong EPI, obviously present at very small Fermion concentration, is masked by the Fermi blockade effects and Migdal's theorem to the extent that it manifests itself as moderate one at large carriers densities. Suppression of strong EPI fingerprints is in agreement with experimental observations in doped high temperature superconductors.

scholarly journals Fermi Blockade of the Electron-phonon Interaction: Why Strong Coupling Effects May Not Be Seen in Optimally Doped High Temperature Superconductors

2020 ◽  
Author(s):  
Andrey Mishchenko ◽  
Naoto Nagaosa ◽  
Nikolay Prokof'ev
Keyword(s):  
High Temperature ◽  
High Temperature Superconductors ◽  
Two Dimensional ◽  
Phonon Interaction ◽  
Strong Electron ◽  
Electron Phonon Interaction ◽  
Holstein Model ◽  
Bold Line ◽  
Spin Polarized ◽  
Migdal's Theorem

Abstract We study how manifestations of strong electron-phonon interaction (EPI) depend on the carrier concentration by solving the two-dimensional Holstein model for the spin-polarized fermions using an approximation free bold-line diagrammatic Monte Carlo (BDMC) method. We show that the strong EPI, obviously present at very small Fermion concentration, is masked by the Fermi blockade effects and Migdal's theorem to the extent that it manifests itself as moderate one at large carriers densities. Suppression of strong EPI fingerprints is in agreement with experimental observations in doped high temperature superconductors.

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