The Superfluid Glass Phase of 3He-A

Abstract

It is established theoretically that an ordered state with continuous symmetry is inherently unstable to arbitrarily small amounts of disorder [1, 2]. This principle is of central importance in a wide variety of condensed systems including superconducting vortices [3, 4], Ising spin models [5] and their dynamics [6], and liquid crystals in porous media [7, 8], where some degree of disorder is ubiquitous, although its experimental observation has been elusive. Based on these ideas it was predicted [9] that 3He in high porosity aerogel would become a superfluid glass. We report here our nuclear magnetic resonance measurements on 3He in aerogel demonstrating destruction of long range orientational order of the intrinsic superfluid orbital angular momentum, confirming the existence of a superfluid glass. In contrast, 3He-A generated by warming from superfluid 3He-B has perfect long-range orientational order providing a mechanism for switching off this effect.

5 pages, 5 figures and supplementary information

References in corpus (5)

• Quantum Simulation of Antiferromagnetic Spin Chains in an Optical Lattice
• On Larkin-Imry-Ma State of 3He-A in Aerogel
• Strong orientational effect of stretched aerogel on the 3He order parameter
• Impurity Effects of Aerogel in Superfluid ${}^3$He
• Globally Anisotropic High Porosity Silica Aerogels

Cited by in corpus (27)

• Excitonic superfluid phase in Double Bilayer Graphene
• Polar phase of superfluid 3He in anisotropic aerogel
• Negative Coulomb Drag in Double Bilayer Graphene
• Evidence for pairing states of composite fermions in double-layer graphene
• Half-quantum vortices and walls bounded by strings in the polar-distorted phases of topological superfluid ${}^3$He
• Exceeding the Landau superflow speed limit with topological Bogoliubov Fermi surfaces
• Suppressing the Kibble-Zurek mechanism by a symmetry-violating bias
• 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
• Topological order generated by random field in a 2D exchange model
• Anisotropic phases of superfluid 3He in compressed aerogel
• Spin, orbital, Weyl and other glasses in topological superfluids
• The Effect of Magnetic Impurities on Superfluid ${}^3$He in Aerogel
• Thermal transport of helium-3 in a strongly confining channel
• Topological nodal line in superfluid ${}^3$He and the Anderson theorem
• Random Anisotropy Magnet at Finite Temperature
• Vortex-bound solitons in topological superfluid ${}^3$He
• Ordered vs Disordered States of the Random-Field Model in Three Dimensions
• Strong-coupling corrections to hard domain walls in superfluid 3He-B
• Superfluid ${}^3$He in Planar Aerogel
• Planar and Nematic Aerogels: DLCA and Superfluid 3He
• Magnetic Susceptibility of Andreev Bound States in Superfluid ${}^3$He-B
• Effect of Dilute Random Field on Continuous-Symmetry Order Parameter
• The Future of the Correlated Electron Problem
• Orbital-Flop Transition of Angular Momentum in a Topological Superfluid
• Energy minima and ordering in ferromagnets with quenched randomness