Identification of 3He-A by ultrasound experiments

P. N. Brusov*, John B Ketterson, P. P. Brusov, N. P. Kulik

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

On the basis of available experimental data Gould [Physica B 178 (1992) 266] has suggested that 3He-A, conventionally identified as the axial phase, may actually be an axi-planar phase. Some experiments have been done to clarify the situation [see, for example, T.R. Mullins et al., Phys. Rev. Lett. 72 (1994) 4177] but the problem is still open. While we take no position on the interpretation of the data, we note that the collective mode structure of the two phases differ and that appropriate measurements could resolve the issue. We investigate this problem within a simple, time-dependent Ginzburg-Landau (GL) model as well as by studying the second variation of the free energy functional. Both methods show that the spectrum in the axial phase is degenerate, while it is split in the axi-planar phase. This fact may serve as a sensitive test of the existence of the latter.

Original languageEnglish (US)
Pages (from-to)264-266
Number of pages3
JournalPhysica B: Condensed Matter
Volume284-288
Issue numberPART I
DOIs
StatePublished - Jan 1 2000

Keywords

  • Axi-planar phase
  • Axial phase
  • He-A

ASJC Scopus subject areas

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

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