High-temperature superconductivity in the Van Hove scenario

Journal Article · Tue Mar 01 04:00:00 EST 1994 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.49.6864· OSTI ID:142614

Goicochea, A G ^[1]

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1. Instituto de Investigaciones en Materiales, Universidad Nacional Autonoma de Meexico, Apartado Postal 70-360, Mexico, Distrito Federal 04510 (Mexico)

The influence of a logarithmic Van Hove singularity in the electronic density of states is studied in the framework of the BCS theory. We use a simplified model, neglecting effects such as interlayer coupling and pair breaking. Through analytic and numerical analyses it is found that although the model can give rise to high temperatures, there are other properties, such as the isotope effect and specific-heat jump at the transition temperature, which cannot be explained properly with this model, as recent experimental data in the high-{ital T}{sub {ital c}} oxides show.

• OSTI ID: 142614
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 10 Vol. 49; ISSN 0163-1829; ISSN PRBMDO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BCS THEORY
CRITICAL TEMPERATURE
ELECTRON DENSITY
ENERGY GAP
HIGH-TC SUPERCONDUCTORS
ISOTOPE EFFECTS
SPECIFIC HEAT
VAN HOVE MODEL