Effects of broadening on BCS theory in the presence of Van Hove singularities

Journal Article · Tue Sep 01 04:00:00 EDT 1992 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.46.5466· OSTI ID:7273974

Penn, D R ^[1]; Cohen, M L ^[2]

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1. Electron Physics Group, National Institute of Standards and Technology, Gaithersburg, Maryland 20899 (United States)
2. Department of Physics, University of California, Materials Sciences Division, Lawrence Berkeley Laboratory, Berkeley, California 94720 (United States)

There have been recent suggestions that high-{ital T}{sub {ital c}} superconductivity can be understood in terms of conventional BCS theory if there is a logarithmic Van Hove singularity in the electron density of states near the Fermi energy as suggested by band theory. We consider the effects of broadening of the singularity on theories of this type. The broadening may be caused by inhomogeneities arising from doping or structural defects, electron inelastic scattering, and three-dimensional dispersion.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 7273974
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 46:9; ISSN 0163-1829; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

665411* -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BAND THEORY
BCS THEORY
DEBYE TEMPERATURE
ENERGY LEVELS
ENERGY-LEVEL DENSITY
FERMI LEVEL
HIGH-TC SUPERCONDUCTORS
INELASTIC SCATTERING
MATHEMATICAL MODELS
PARTICLE MODELS
SCATTERING
SUPERCONDUCTORS
VAN HOVE MODEL