Thermal boundary conductance between the U2D2 solid and B superfluid phases of3He

Y. P. Feng, Peter E Schiffer, D. D. Osheroff, M. C. Cross

Research output: Contribution to journalArticle

Abstract

We present the first measurement of the thermal boundary conductance, 1/RB, between the U2D2 spin ordered solid and the B superfluid phases of3He. We find that 1/RB is exceedingly high, roughly seven orders of magnitude greater than that between sintered silver powder and liquid3He. For T<0.56 mK, 1/RB appeared to be thermally activated, i.e. 1/RB∼exp(-ε/kBT), with ε=4.5(±0.5) mK, close to the superfluid gap energy. We also present a theory involving magnon-quasiparticle coupling as a model to explain the experimental observations.

Original languageEnglish (US)
Pages (from-to)475-490
Number of pages16
JournalJournal of Low Temperature Physics
Volume90
Issue number5-6
DOIs
StatePublished - Mar 1 1993

ASJC Scopus subject areas

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

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