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arXiv · 0802.3667

Stability of the A-like Phase of Superfluid 3He in Aerogel with Globally Anisotropic Scattering

J. P. Davis·J. Pollanen·B. Reddy·K. R. Shirer·H. Choi·W. P. Halperin
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Abstract

It has been suggested that anisotropic quasiparticle scattering will stabilize anisotropic phases of superfluid $^3$He contained within highly porous silica aerogel. For example, global anisotropy introduced via uniaxial compression of aerogel might stabilize the axial state, which is called the A-phase in bulk superfluid 3He. Here we present measurements of the phase diagram of superfluid 3He in a 98% porous silica aerogel using transverse acoustic impedance methods. We show that uniaxial compression of the aerogel by 17% does not stabilize an axial phase.

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J. P. Davis, J. Pollanen, B. Reddy, K. R. Shirer, H. Choi, W. P. Halperin. 2008-02-25. Stability of the A-like Phase of Superfluid 3He in Aerogel with Globally Anisotropic Scattering. https://doi.org/10.1103/physrevb.77.140502

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