Energy-gap structure of a {ital t}-{ital J} bilayer

Journal Article · Mon Apr 01 04:00:00 EST 1996 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.53.9359· OSTI ID:280197

Biagini, M ^[1]

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1. Istituto Nazionale Fisica della Materia and Dipartimento di Fisica, Universita di Modena, via Campi 213/A, I-41100 Modena (Italy)

The role of interlayer coupling in copper-oxide superconductors represents an open problem in high-{ital T}{sub {ital c}} superconductivity. In this work, the energy gap and the density of states of a {ital t}-{ital J} bilayer are analyzed for different value of the doping {delta} within a mean-field approximation. It is shown that an interlayer single-electron hopping increases the ratio {ital R}=2{Delta}/{ital KT}{sub {ital c}} and that the extent of such increase depends strongly on the doping {delta}. The density of states contains both BCS-like and logarithmic singularities and presents a multiple-peak structure, in qualitative agreement with recent tunneling experiments. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 280197
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 14 Vol. 53; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BCS THEORY
CORRELATED-PARTICLE MODELS
ENERGY GAP
HIGH-TC SUPERCONDUCTORS
MEAN-FIELD THEORY
SUPERCONDUCTIVITY
TUNNEL EFFECT