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

Anupam Garg; Ding Chuan Chen

doi:10.1016/0921-4526(94)91508-3

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

Anupam Garg^*, Ding Chuan Chen

^*Corresponding author for this work

Physics and Astronomy

Research output: Contribution to journal › Article › peer-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 D_6h (the point group of UPt₃) is allowed. This model is studied and compared to experiment.

Original language	English (US)
Pages (from-to)	2017-2018
Number of pages	2
Journal	Physica B: Physics of Condensed Matter
Volume	194-196
Issue number	PART 2
DOIs	https://doi.org/10.1016/0921-4526(94)91508-3
State	Published - Feb 2 1994

Funding

° Supported by the National Science Foundation through Grant No. DMR-9120521

ASJC Scopus subject areas

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

Access to Document

10.1016/0921-4526(94)91508-3

Cite this

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title = "Constraints on the order parameter of superconducting UPt3 from the phase diagram",

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.",

author = "Anupam Garg and Chen, {Ding Chuan}",

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AB - 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.

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