INFLUENCE OF VAN-HOVE SINGULARITIES ON THE THERMAL-CONDUCTIVITY OF HIGH-T-C SUPERCONDUCTORS

Authors
HOUSSA M AUSLOOS M DURCZEWSKI K
Citation
M. Houssa et al., INFLUENCE OF VAN-HOVE SINGULARITIES ON THE THERMAL-CONDUCTIVITY OF HIGH-T-C SUPERCONDUCTORS, Physical review. B, Condensed matter, 54(9), 1996, pp. 6126-6128
Citations number
30
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
54
Issue
9
Year of publication
1996
Pages
6126 - 6128
Database
ISI
SICI code
0163-1829(1996)54:9<6126:IOVSOT>2.0.ZU;2-W
Abstract
We calculate the electronic contribution kappa(e) to the thermal condu ctivity of a two-dimensional d(x2-y2)-wave superconductor presenting l ogarithmic Van Hove singularities (VHS) in the density of states. The influence of the position of these VHS from the Fermi level on the the rmal conductivity peak observed below T-c is investigated. Experimenta l results on different YBa2Cu3O7-x compounds with various oxygen stoic hiometry x can be well described by this model with reasonable values of the physical parameters.