Strong-coupling calculation of the lower critical field in high-T/sub c/ superconductors

Journal Article · Thu Oct 01 04:00:00 EDT 1987 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.36.5665· OSTI ID:6010137

Rammer, J

Using the strong-coupling version of Usadel's dirty-limit theory, the lower critical field H/sub c//sub 1/ of high-T/sub c/ superconductors is calculated. It is shown that the strong-coupling theory predicts a marked plateau in H/sub c//sub 1/(T) at low temperatures, which is most pronounced for large electron-phonon coupling parameters lambda. This effect can be used as a criterion for conventional electron-phonon superconductivity in high-T/sub c/ superconductors. The plateau has not been observed in early measurements of H/sub c//sub 1/ in granular samples.

• Research Organization: Physikalisches Institut der Universitaet Bayreuth, D-8580 Bayreuth, West Germany
• OSTI ID: 6010137
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 36:10; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

656100* -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CRITICAL FIELD
ELECTRON-PHONON COUPLING
LIMITING VALUES
MAGNETIC FIELDS
MATHEMATICAL MODELS
PARTICLE MODELS
PHYSICAL PROPERTIES
STRONG-COUPLING MODEL
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE