Phenomenological phase diagram of superfluid 3He in a stretched aerogel

Abstract

Highly anisotropic "nematically ordered" aerogel induces global uniaxial anisotropy in superfluid 3He. The anisotropy lowers symmetry of 3He in aerogel from spherical to axial. As a result instead of one transition temperature in the state, characterized by the orbital moment l=1 there are two, corresponding to projections l_z=o and l_z=\pm 1. The splitting of transition has a pronounced effect on the phase diagram of superfluid 3He and on a structures of appearing phases. Possible phase diagrams, obtained phenomenologically on a basis of Landau expansion of thermodynamic potential in a vicinity of the transition temperature are presented here. The order parameters, corresponding to each phase and their temperature dependencies are found.

10 pages, accepted for publication in ZhETF. A few typos are corrected, more exact experimental data for an average diameter of a strand is quoted in the introduction

References in corpus (2)

• On Larkin-Imry-Ma State of 3He-A in Aerogel
• Strong Coupling Corrections to the Ginzburg-Landau Theory of Superfluid ^{3}He

Cited by in corpus (10)

• Polar phase of superfluid 3He in anisotropic aerogel
• Influence of Magnetic Scattering on Superfluidity of 3He in Nematic Aerogel
• Analog of Anderson theorem for the polar phase of liquid 3He in nematic aerogel
• Superfluid 3He in squeezed nematic aerogel
• Oscillating nematic aerogel in superfluid 3He
• Impact of Strong Anisotropy on Phase Diagram of Superfluid ${}^3$He in Aerogels
• Superfluid ${}^3$He in Planar Aerogel
• Interaction of two magnetic resonance modes in polar phase of superfluid 3He
• Splitting of the superfluid transition in ${}^3$He by nematic aerogels
• Effect of random anisotropy on NMR frequency shift in the polar phase of the superfluid 3He