Premium
Effect of nonadiabaticity on the Fermi‐edge photoemission and tunneling spectra of superconductors
Author(s) -
Baňacký Pavol,
Svrček Michal,
Szöcs Vojtech
Publication year - 1996
Publication title -
international journal of quantum chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.484
H-Index - 105
eISSN - 1097-461X
pISSN - 0020-7608
DOI - 10.1002/(sici)1097-461x(1996)58:5<487::aid-qua6>3.0.co;2-u
Subject(s) - spectral line , superconductivity , condensed matter physics , polaron , quantum tunnelling , fermi level , chemistry , electron , fermi gamma ray space telescope , fermi surface , atomic physics , physics , quantum mechanics
Temperature dependence of the experimental photoemission spectra of the high‐ T c superconductors have been interpreted and simulated by the recently formulated molecular nonadiabatic theory of the electron‐vibrational interaction. The change of the spectral feature below T c , particularly formation of the narrow, near Fermi surface (FS) edge, peak separated by the dip from a broad spectral band at higher binding energies has been shown to be the consequence of the nonadiabatic electron‐phonon coupling and corresponding properties of the nonadiabatic polarons. Simulation yields very good fit to the experimental temperature‐dependent spectra, with the calculated value of the gap 30.5 meV. © 1996 John Wiley & Sons, Inc.