Impurity effects of aerogel in superfluid He

William P. Halperin, Hyoungsoon Choi, John P. Davis, Johannes Pollanen

Research output: Contribution to journalArticlepeer-review

44 Scopus citations


The discovery of superfluid 3He in high porosity silica aerogels, and subsequent experimental and theoretical work, have led to a better general understanding of quasiparticle scattering from impurities in unconventional pairing systems. It is immensely helpful for understanding impurity effects in the case of superfluid 3He that the structure of its order parameter is well-established. An overview of impurity effects is presented with emphasis on those experiments which have a quantitative interpretation in terms of theoretical models for homogeneous and inhomogeneous scattering. The latter can account successfully for most experimental results.

Original languageEnglish (US)
Article number111002
JournalJournal of the Physical Society of Japan
Issue number11
StatePublished - Nov 2008


  • Aerogel
  • He
  • Impurity
  • Superfluid
  • Unconventional pairing

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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