A-B transition of superfluid He3 in aerogel and the effect of anisotropic scattering

C. L. Vicente*, H. C. Choi, J. S. Xia, W. P. Halperin, N. Mulders, Y. Lee

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

37 Scopus citations

Abstract

We report the results of high-frequency acoustic shear impedance measurements on superfluid He3 confined in 98% porosity silica aerogel. Using 8.69MHz continuous wave excitation, we measured the acoustic shear impedance as a function of temperature for the sample pressures of 28.4 and 33.5bar. We observed the A-B transition on warming in zero magnetic field. Our observations show that the A and B phases in aerogel coexist in a temperature range of about 100μK in width. We propose that differences in the relative stability of the A and B phases arising from anisotropic scattering can account for our observations.

Original languageEnglish (US)
Article number094519
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume72
Issue number9
DOIs
StatePublished - Sep 1 2005

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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