Andreev scattering in the anisotropic heavy-fermion superconductor UPt{sub 3}

Journal Article · Fri Sep 01 04:00:00 EDT 1995 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.52.6801· OSTI ID:115834

Goll, G ^[1]; Bruder, C ^[2]; Loehneysen, H v ^[1]

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1. Physikalisches Institut, Universitaet Karlsruhe, 76128 Karlsruhe (Germany)
2. Institut fuer Theoretische Festkoerperphysik, Universitaet Karlsruhe, 76128 Karlsruhe (Germany)

Andreev reflection between a normal metal and a superconductor was employed to investigate the superconducting order parameter of the heavy-fermion superconductor UPt{sub 3}. In the present work, point-contact spectra are compared with {ital dV}/{ital dI} curves calculated assuming different order-parameter symmetries, and that the electrons are injected preferentially in the forward direction with an angular spread described by a cone. Various order-parameter structures are compared for nonideal interfaces of {ital d}-wave superconductors and different directions of current flow. The analysis favors a two-dimensional order parameter with an orbital part with a line of nodes in the basal plane and point nodes along the {ital c} axis.

• OSTI ID: 115834
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 9 Vol. 52; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ANISOTROPY
D WAVES
ELECTRIC CURRENTS
ORDER PARAMETERS
PLATINUM COMPOUNDS
SUPERCONDUCTIVITY
TUNNEL EFFECT
TWO-DIMENSIONAL CALCULATIONS
URANIUM COMPOUNDS