Identification of odd-parity superconductivity in UPt sub 3 from paramagnetic effects on the upper critical field

Journal Article · Mon Jan 28 00:00:00 EST 1991 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.66.484· OSTI ID:5965851

Choi, C H; Sauls, J A ^[1]

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1. Department of Physics and Astronomy, Northwestern University, 2145 Sheridan Road, Evanston, IL (USA)

We present a theoretical explanation of the unusual temperature-dependent anisotropy of {ital H}{sub {ital c}2} reported by Shivaram {ital et} {ital al}. for single crystals of UPt{sub 3}, which we argue provides strong support for unconventional {ital odd}-{ital parity} pairing. We show that the observed low-temperature crossover in the anisotropy ratio, {ital H}{sub {ital c}2}{sup {perpendicular}}/{ital H}{sub {ital c}2}{sup {parallel}}, can be explained by paramagnetic limiting for {bold H} parallel to the sixfold axis within BCS pairing theory if the order parameter has {ital odd} {ital parity} and there is strong spin-orbit coupling of the pair spin to the crystal axes.

• OSTI ID: 5965851
• Journal Information: Physical Review Letters; (USA), Vol. 66:4; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
PLATINUM ALLOYS
SUPERCONDUCTIVITY
URANIUM ALLOYS
BCS THEORY
CRITICAL FIELD
ELECTRON PAIRS
HEAVY LEPTONS
HEXAGONAL LATTICES
MONOCRYSTALS
ORDER PARAMETERS
PARAMAGNETISM
PARITY
TEMPERATURE DEPENDENCE
THEORETICAL DATA
ACTINIDE ALLOYS
ALLOYS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALS
DATA
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTARY PARTICLES
FERMIONS
INFORMATION
LEPTONS
MAGNETIC FIELDS
MAGNETISM
NUMERICAL DATA
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
PLATINUM METAL ALLOYS
POSTULATED PARTICLES
360104* - Metals & Alloys- Physical Properties
656100 - Condensed Matter Physics- Superconductivity