Two-order-parameter theory of the phase diagram of superconducting UPt[sub 3]

Journal Article · Sat Jan 01 04:00:00 EST 1994 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.49.479· OSTI ID:5404082

Garg, A; Chen, D ^[1]

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1. Department of Physics and Astronomy and Materials Research Center, Northwestern University, Evanston, Illinois 60208 (United States)

The [ital H]-[ital T] phase diagram of UPt[sub 3] has previously been shown to be incompatible with a two-component-vector order parameter. It is studied in this paper within the [ital AB]'' model, consisting of two nearly degenerate order parameters, one transforming as an [ital A] and the other as a [ital B] representation of [ital D][sub 6[ital h]]. The nature of the different one- and two-order-parameter vortex-lattice phases and the possible transitions between them are examined in detail. A quantitative comparison is made with the experimental diagram, and the parameters in the Ginzburg-Landau free energy are deduced. It is found that the flux lattice evolves continuously in the low-[ital H], low-[ital T] phase with no additional transitions between different types of two-order-parameter lattices, and that its orientation is in accord with neutron-diffraction studies near one of the inner transition lines.

• OSTI ID: 5404082
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 49:1; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

665411* -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ACTINIDE ALLOYS
ALLOY SYSTEMS
ALLOYS
BINARY ALLOY SYSTEMS
DIAGRAMS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
PHASE DIAGRAMS
PHYSICAL PROPERTIES
PLATINUM ALLOYS
PLATINUM METAL ALLOYS
SUPERCONDUCTIVITY
URANIUM ALLOYS