Equal-Spin Pairing State of Superfluid 3He in Aerogel
Kazushi Aoyama, Ryusuke Ikeda
Abstract
The equal-spin pairing (ESP) state, the so-called A-like phase, of superfluid 3He in aerogels is studied theoretically in the Ginzburg-Landau (GL) region by examining thermodynamics, and the resulting equilibrium phase diagram is mapped out. We find that, among the ABM, planar, and robust pairing states, the ABM state with presumably quasi long-ranged superfluid order is the best candidate of the A-like phase with a strange lowering of the polycritical point (PCP) observed experimentally.
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