Constraints on the order parameter of superconducting UPt3 from the phase diagram

Anupam Garg*, Ding Chuan Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The tetracritical point seen in the HT phase diagram of UPt3 for several orientations of H strongly constrains Ginzburg-Landau (GL) theories, as the GL "Hamiltonian" must have a conserved quantity Q. A two-component vector order parameter model has a Q for H∥c but no tetracritical point. Among accidentally nearly degenerate like-parity order parameters, only the case where one behaves as an A and the other as a B representation of D6h (the point group of UPt3) is allowed. This model is studied and compared to experiment.

Original languageEnglish (US)
Pages (from-to)2017-2018
Number of pages2
JournalPhysica B: Physics of Condensed Matter
Volume194-196
Issue numberPART 2
DOIs
StatePublished - Feb 2 1994

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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