Stability of the A-like Phase of Superfluid 3He in Aerogel with Globally Anisotropic Scattering
Abstract
It has been suggested that anisotropic quasiparticle scattering will stabilize anisotropic phases of superfluid 3He 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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