Surface boundary conditions for the Ginzburg-Landau theory of {ital d}-wave superconductors

Journal Article · Fri Mar 01 04:00:00 EST 1996 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.53.5863· OSTI ID:279105

Alber, M; Baeuml, B; Ernst, R; Kienle, D; Kopf, A; Rouchal, M ^[1]

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1. Graduiertenkolleg Materialien und Phaenomene bei tiefen Temperaturen, Physikalisches Institut, Universitaet Bayreuth, D-95440 Bayreuth (Germany)

We calculate de Gennes{close_quote} extrapolation length for a {ital d}-wave superconductor near a surface within Fermi-liquid theory. The extrapolation length depends critically on the orientation of the surface relative to the crystal axes and on the surface roughness. This sensitivity of the boundary conditions for a {ital d}-wave order parameter to surface conditions is not found in traditional {ital s}-wave superconductors, and is a signature of anisotropic pairing with a changing sign of the order parameter along the Fermi surface. de Gennes{close_quote} method is used to calculate the reduction of {ital T}{sub {ital c}} in thin strips of high-{ital T}{sub {ital c}} superconductors. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 279105
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 9 Vol. 53; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BOUNDARY CONDITIONS
D WAVES
ENERGY GAP
FERMI GAS
GINZBURG-LANDAU THEORY
HIGH-TC SUPERCONDUCTORS
QUASI PARTICLES