A1 and A2 transitions in superfluid3He in 98% porosity aerogel

H. C. Choi; A. J. Gray; C. L. Vicente; J. S. Xia; G. Gervais; W. P. Halperin; N. Mulders; Y. Lee

doi:10.1103/PhysRevLett.93.145302

A₁ and A₂ transitions in superfluid³He in 98% porosity aerogel

H. C. Choi^*, A. J. Gray, C. L. Vicente, J. S. Xia, G. Gervais, W. P. Halperin, N. Mulders, Y. Lee

^*Corresponding author for this work

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

The effects of static disorder in unconventional superfluid ³He were investigated. Shear acoustic impedance measurements were performed on this system in the presence of magnetic fields upto 15 T at the sample pressures of 28.4 and 33.5 bars. The splitting of the superfluid transition into two transition in high fields in both bulk and liquid in aerogel was observed. It was found that the field dependence of each transition was consistent with that of the A₁m phase observed in pure liquid with a reduced strong coupling effect.

Original language	English (US)
Article number	145302
Pages (from-to)	145302-1-145302-4
Journal	Physical review letters
Volume	93
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevLett.93.145302
State	Published - Oct 1 2004

Funding

This work is partially supported by the NSF through DMR-0239483 and a NHMFL IHRP grant. The experiment was performed at the High B/T Facility of NHMFL at the University of Florida. We acknowledge useful discussions with P. Kumar, M. Meisel, J. Sauls, Y. Takano, G. Kharadze, and I. Fomin. Y. L. thanks the Alfred P. Sloan Foundation for financial support.

ASJC Scopus subject areas

General Physics and Astronomy

Access to Document

10.1103/PhysRevLett.93.145302

Cite this

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title = "A1 and A2 transitions in superfluid3He in 98% porosity aerogel",

abstract = "The effects of static disorder in unconventional superfluid 3He were investigated. Shear acoustic impedance measurements were performed on this system in the presence of magnetic fields upto 15 T at the sample pressures of 28.4 and 33.5 bars. The splitting of the superfluid transition into two transition in high fields in both bulk and liquid in aerogel was observed. It was found that the field dependence of each transition was consistent with that of the A1m phase observed in pure liquid with a reduced strong coupling effect.",

author = "Choi, {H. C.} and Gray, {A. J.} and Vicente, {C. L.} and Xia, {J. S.} and G. Gervais and Halperin, {W. P.} and N. Mulders and Y. Lee",

note = "Funding Information: This work is partially supported by the NSF through DMR-0239483 and a NHMFL IHRP grant. The experiment was performed at the High B/T Facility of NHMFL at the University of Florida. We acknowledge useful discussions with P. Kumar, M. Meisel, J. Sauls, Y. Takano, G. Kharadze, and I. Fomin. Y. L. thanks the Alfred P. Sloan Foundation for financial support.",

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AU - Choi, H. C.

AU - Gray, A. J.

AU - Vicente, C. L.

AU - Xia, J. S.

AU - Gervais, G.

AU - Halperin, W. P.

AU - Mulders, N.

AU - Lee, Y.

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N2 - The effects of static disorder in unconventional superfluid 3He were investigated. Shear acoustic impedance measurements were performed on this system in the presence of magnetic fields upto 15 T at the sample pressures of 28.4 and 33.5 bars. The splitting of the superfluid transition into two transition in high fields in both bulk and liquid in aerogel was observed. It was found that the field dependence of each transition was consistent with that of the A1m phase observed in pure liquid with a reduced strong coupling effect.

AB - The effects of static disorder in unconventional superfluid 3He were investigated. Shear acoustic impedance measurements were performed on this system in the presence of magnetic fields upto 15 T at the sample pressures of 28.4 and 33.5 bars. The splitting of the superfluid transition into two transition in high fields in both bulk and liquid in aerogel was observed. It was found that the field dependence of each transition was consistent with that of the A1m phase observed in pure liquid with a reduced strong coupling effect.

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