ISSN:
1572-9605
Keywords:
electron–phonon coupling
;
Eliashberg spectral function
;
high-T c superconductors
Source:
Springer Online Journal Archives 1860-2000
Topics:
Electrical Engineering, Measurement and Control Technology
,
Physics
Notes:
Abstract We used a simplified but more realistic form of a model spectral functions for some high-T c superconductors (e.g., LSCO, YBCO, BSCCO), avoiding the elaborate process of solving the Eliashberg equations numerically. The resulting spectral functions, constructed using the phonon density of states (PDOS), obtained from INS experiments with the easy use of available expressions, reproduce the observed critical temperature, gap ratio, and several other parameters. T c is found to have a stronger increase with the electron–phonon coupling constant λ compared to those obtained from several equations, constructed from numerical solution of the Eliashberg equations for lower λ values. The obtained functions show widely spreading spectra that inhibit lattice instability by yielding not too large values of λ (〈 2.95).
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1007816715982
Permalink