Vortex-antivortex interaction in high-[ital T][sub [ital c]] superconductors

Journal Article · Fri Dec 31 23:00:00 EST 1993 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.49.1218· OSTI ID:5425924

Timm, C; Appel, J ^[1]

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1. Universitaet Hamburg, I. Institut fuer Theoretische Physik, Jungiusstr. 9, 20355 Hamburg (Germany)

The free energy of a vortex-antivortex pair in a Josephson-coupled layered superconductor is derived within the framework of the Lawrence-Doniach theory. We find that the free energy of large pairs depends linearly on the pair separation and that there is no logarithmic term in the free energy for large pairs. We also derive the free energy of a pair of vortex lines, i.e., a vortex-antivortex pair in every layer. It is found that the free energy of this system corresponds to the usual result for conventional superconductors. In conclusion we discuss that the vortex-antivortex interaction cannot be described by a simple modification of the Kosterlitz-Thouless theory.

• OSTI ID: 5425924
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 49:2; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

665411* -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ENERGY
FREE ENERGY
GINZBURG-LANDAU THEORY
HIGH-TC SUPERCONDUCTORS
INTERACTIONS
JOSEPHSON JUNCTIONS
JUNCTIONS
KOSTERLITZ-THOULESS THEORY
MAGNETIC FLUX
PAIRING INTERACTIONS
PHYSICAL PROPERTIES
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
VORTICES