Charge modulation at the surface of high-T{sub c} superconductors

Journal Article · Wed Oct 01 04:00:00 EDT 1997 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.56.8386· OSTI ID:632621

Emig, T; Samokhin, K; Scheidl, S ^[1]

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1. Institut fuer Theoretische Physik, Universitaet zu Koeln, Zuelpicher Strasse 77, D-50937 Koeln (Germany)

It is shown here that surfaces of high-temperature superconductors are covered by dipole layers. The charge-density modulation is induced by the local suppression of the gap function at the surface. This effect is studied in the framework of the Ginzburg-Landau theory and crucially depends on the appropriate boundary conditions. Those are derived from Gor{close_quote}kov{close_quote}s equations for a d-wave pairing symmetry. Within this framework the structure of the surface dipole layer is determined. The contribution of this charging to a lens effect of superconducting films with holes, which has been studied in recent experiments, is discussed. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 632621
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 13 Vol. 56; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BOUNDARY CONDITIONS
CHARGE DENSITY
D WAVES
DIPOLE MOMENTS
ENERGY GAP
GINZBURG-LANDAU THEORY
HIGH-TC SUPERCONDUCTORS
MODULATION
SUPERCONDUCTING FILMS