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

doi:10.1103/PhysRevB.72.094519

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

Physics and Astronomy

Research output: Contribution to journal › Article › peer-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 language	English (US)
Article number	094519
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	72
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevB.72.094519
State	Published - Sep 1 2005

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.72.094519

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title = "A-B transition of superfluid He3 in aerogel and the effect of anisotropic scattering",

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.",

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AU - Vicente, C. L.

AU - Choi, H. C.

AU - Xia, J. S.

AU - Halperin, W. P.

AU - Mulders, N.

AU - Lee, Y.

PY - 2005/9/1

Y1 - 2005/9/1

N2 - 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.

AB - 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.

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JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

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

Abstract

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