Anisotropic aerogels for studying superfluid 3He

J. Pollanen*, S. Blinstein, H. Choi, J. P. Davis, T. M. Lippman, L. B. Lurio, W. P. Halperin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

It may be possible to stabilize new superfluid phases of 3He with anisotropic silica aerogels. We discuss two methods that introduce anisotropy in the aerogel on length scales relevant to superfluid 3He. First, anisotropy can be induced with uniaxial strain. A second method generates anisotropy during the growth and drying stages. We have grown cylindrical ∼98% aerogels with anisotropy indicated by preferential radial shrinkage after supercritical drying and find that this shrinkage correlates with small angle x-ray scattering (SAXS). The growth-induced anisotropy was found to be ∼90° out of phase relative to that induced by strain. This has implications for the possible stabilization of superfluid phases with specific symmetry.

Original languageEnglish (US)
Pages (from-to)579-583
Number of pages5
JournalJournal of Low Temperature Physics
Volume148
Issue number5-6
DOIs
StatePublished - Sep 2007

Keywords

  • 61.10.Eq
  • 67.57.-z
  • 67.57.Pq

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics

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