Soliton-like Spin State in the A-like Phase of 3He in Anisotropic Aerogel

TL;DR

This paper reports the discovery of a new stable spin state in superfluid 3He confined in anisotropic aerogel, characterized by unique NMR properties and possibly formed by domain walls pinned by the aerogel structure.

Contribution

It introduces a novel stable spin state in superfluid 3He within anisotropic aerogel, formed via RF excitation during cooling, with distinct NMR signatures.

Findings

Identification of a new stable spin state in superfluid 3He

Unique NMR properties distinguish this state from the standard phase

Possible formation by textural domain walls pinned by aerogel

Abstract

We have found a new stable spin state in the A-like phase of superfluid 3He confined to intrinsically anisotropic aerogel. The state can be formed by radiofrequency excitation applied while cooling through the superfluid transition temperature and its NMR properties are different from the standard A-like phase obtained in the limit of very small excitation. It is possible that this new state is formed by textural domain walls pinned by aerogel.