Contrasting Mechanical Anisotropies of the Superfluid He3 Phases in Aerogel

D. I. Bradley, S. N. Fisher, A. M. Guénault, R. P. Haley, N. Mulders, S. O’Sullivan, G. R. Pickett, J. Roberts, and V. Tsepelin
Phys. Rev. Lett. 98, 075302 – Published 14 February 2007

Abstract

There has been much recent interest in how impurity scattering may affect the phases of the p-wave superfluid He3. Impurities may be added to the otherwise absolutely pure superfluid by immersing it in aerogel. Some predictions suggest that impurity scattering may destroy orientational order and force all of the superfluid phases to have an isotropic superfluid density. In contrast to this, we present experimental data showing that the response of the A-like phase to superfluid flow is highly anisotropic, revealing a texture that is easily modified by flow.

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  • Received 18 October 2006

DOI:https://doi.org/10.1103/PhysRevLett.98.075302

©2007 American Physical Society

Authors & Affiliations

D. I. Bradley1, S. N. Fisher1, A. M. Guénault1, R. P. Haley1, N. Mulders2, S. O’Sullivan1, G. R. Pickett1, J. Roberts1, and V. Tsepelin1

  • 1Department of Physics, Lancaster University, Lancaster, LA1 4YB, United Kingdom
  • 2Department of Physics and Astronomy, University of Delaware, Newark, Delaware, USA

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Issue

Vol. 98, Iss. 7 — 16 February 2007

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