Influence of Van Hove singularities on the thermal conductivity of high-{ital T}{sub {ital c}} superconductors

Journal Article · Sun Sep 01 00:00:00 EDT 1996 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.54.6126· OSTI ID:383237

Houssa, M; Ausloos, M ^[1]; Durczewski, K ^[2]

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1. S.U.P.R.A.S., Institut de Physique B5, University of Liege, B-4000 Liege (Belgium)
2. Institute for Low Temperatures and Structure Research, Polish Academy of Sciences, P. O. Box 937, PL-50950 Wroclaw (Poland)

We calculate the electronic contribution {kappa}{sub {ital e}} to the thermal conductivity of a two-dimensional {ital d}{sub {ital x}{sup 2}{minus}{ital y}{sup 2}}-wave superconductor presenting logarithmic Van Hove singularities (VHS) in the density of states. The influence of the position of these VHS from the Fermi level on the thermal conductivity peak observed below {ital T}{sub {ital c}} is investigated. Experimental results on different YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}} compounds with various oxygen stoichiometry {ital x} can be well described by this model with reasonable values of the physical parameters. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 383237
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 9 Vol. 54; ISSN 0163-1829; ISSN PRBMDO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BARIUM OXIDES
BORN APPROXIMATION
COPPER OXIDES
D WAVES
ELASTIC SCATTERING
ELECTRONIC STRUCTURE
ENERGY-LEVEL DENSITY
HIGH-TC SUPERCONDUCTORS
SINGULARITY
TEMPERATURE DEPENDENCE
THERMAL CONDUCTIVITY
YTTRIUM OXIDES