Lower critical field of a Josephson-coupled layer model of high- T sub c superconductors

Journal Article · Thu Aug 01 04:00:00 EDT 1991 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.44.2732· OSTI ID:5307638

Clem, J R; Coffey, M W; Hao, Z ^[1]

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1. Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa (USA)

We calculate the lower critical field {ital H}{sub {ital c}1} for a magnetic field applied parallel to the layers of a Josephson-coupled layer model of high-{ital T}{sub {ital c}} superconductors. This result is obtained by using an expression for the vortex line energy that explicitly involves the gauge-invariant phase difference between superconducting layers. We examine the behavior of {ital H}{sub {ital c}1} as a function of temperature and discuss the manifestation of the superconductor discreteness below a crossover temperature where the coherence length {xi}{sub {ital c}}({ital T}) becomes comparable to the lattice constant {ital c}. This temperature dependence is contrasted with the standard result for {ital H}{sub {ital c}1} for a continuous anisotropic type-II superconductor.

• DOE Contract Number: FG02-90ER45427
• OSTI ID: 5307638
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 44:6; ISSN PRBMD; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

656100* -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COHERENCE LENGTH
CRITICAL FIELD
DIMENSIONS
HIGH-TC SUPERCONDUCTORS
JOSEPHSON EFFECT
LENGTH
MAGNETIC FIELDS
MATHEMATICAL MODELS
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE