Orientation of the Angular Momentum in Superfluid 3He-A in a Stretched Aerogel

Abstract

Superfluid 3He-A in a fully characterized stretched aerogel, used in previous work [1], has been studied for parallel and perpendicular orientations of the magnetic field relative to the anisotropy axis of the aerogel. Consistently, we find that an equal spin pairing state (ESP) is stabilized down to the lowest temperature. From our pulsed NMR frequency shifts as a function of temperature and tip angle, the orientation of the orbital angular momentum l has been determined. The aerogel anisotropy introduced by uniaxial stretching tends to align l in the axial state parallel to the strain axis, confirming the theory proposed by Sauls [2] and contrary to the prediction of Volovik [3] based on an impurity calculation of Rainer and Vuorio [4].

3 pages, 3 figures

References in corpus (3)

• On Larkin-Imry-Ma State of 3He-A in Aerogel
• Strong orientational effect of stretched aerogel on the 3He order parameter
• Globally Anisotropic High Porosity Silica Aerogels

Cited by in corpus (11)

• Chiral Phases of Superfluid 3He in an Anisotropic Medium
• Anisotropic 2D Larkin-Imry-Ma state in polar distorted ABM phase of 3He in "nematically ordered" aerogel
• Superfluid 3He in Aerogel
• Stability of superfluid 3He-B in compressed aerogel
• New Phases of Superfluid ${}^3$He Confined in Aerogels
• Superfluid ${}^3$He in Planar Aerogel
• Magnetic Susceptibility of Andreev Bound States in Superfluid ${}^3$He-B
• Planar and Nematic Aerogels: DLCA and Superfluid 3He
• Orbital-Flop Transition of Angular Momentum in a Topological Superfluid
• Deformed aerogels in the superfluid 3He
• Local structure of ordered and disordered states of 3He-A in aerogel