Josephson tunneling in high-{ital T}{sub {ital c}} superconductors

Journal Article · Mon Jul 01 04:00:00 EDT 1996 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.54.588· OSTI ID:285632

Walker, M B; Luettmer-Strathmann, J ^[1]

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1. Department of Physics, University of Toronto, Toronto, Ontario, M5S1A7 (CANADA)

In this article a macroscopic invariance group describing the superconducting state of a twinned crystal is introduced and shown to provide a useful framework for the discussion of Josephson tunneling in twinned crystals. Josephson tunneling from time-reversal symmetry-breaking states is described and compared with that from time-reversal invariant states for both twinned and untwinned crystals and for both {ital c}-axis and basal-plane currents, in a model for orthorhombic Y-Ba-Cu-O. In addition, a ring geometry, which allows {ital s}-wave and {ital d}{sub {ital x}{sup 2}{minus}{ital y}{sup 2}}-wave superconductivity in a tetragonal superconductor to be distinguished on the basis of symmetry arguments only, is proposed and analyzed. Finally, an appendix gives details of the experimental Josephson tunneling evidence for a superconducting state of orthorhombic {ital ux}{sup 2}+{ital vy}{sup 2} symmetry in Y-Ba-Cu-O. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 285632
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 1 Vol. 54; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BARIUM OXIDES
COPPER OXIDES
D WAVES
HIGH-TC SUPERCONDUCTORS
JOSEPHSON EFFECT
ORTHORHOMBIC LATTICES
S WAVES
SYMMETRY BREAKING
YTTRIUM OXIDES