Interlayer vortices and edge dislocations in high-temperature superconductors

Journal Article · Sat Jul 01 04:00:00 EDT 1995 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.52.623· OSTI ID:76433

Kuklov, A B ^[1]; Krakovsky, A ^[2]; Birman, J L ^[1]

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1. Department of Physics, The City College of the City University of New York, New York, New York 10031 (United States)
2. Department of Physics, New York University, New York, New York 10003 (United States)

The interaction of an edge dislocation made of half the superconducting plane with a magnetic interlayer vortex is considered within the framework of the Lawrence-Doniach model with negative as well as positive Josephson interlayer coupling. In the first case the binding energy of the vortex and the dislocation has been calculated by employing a variational procedure. The current distribution around the bound vortex turns out to be asymmetric. In the second case the dislocation carries a spontaneous magnetic half vortex, whose binding energy with the dislocation turns out to be infinite. The half-vortex energy has been calculated by the same variational procedure. Implications of the possible presence of such half vortices for the properties of high-temperature sueprconductors are discussed. We suggest employing artificially made superconductor-ferromagnet superlattices with the half plane removed to observe fractional vortices.

• OSTI ID: 76433
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 1 Vol. 52; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BINDING ENERGY
EDGE DISLOCATIONS
HIGH-TC SUPERCONDUCTORS
MAGNETIC FLUX
MIXED STATE
VARIATIONAL METHODS