Heat capacity of liquid 4He confined in a nanoporous glass

Keiichi Yamamoto, Yoshiyuki Shibayama, Keiya Shirahama

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

We report a preliminary study of heat capacities of 4He confined in a nanoporous Gelsil glass that has nanopores of 2.5 nm in diameter. The heat capacity has a broad peak at a temperature far above the superfluid transition temperature obtained by torsional oscillator technique. The heat-capacity peak is attributed to formation of localized Bose-Einstein Condensates in the nanopores, in which the long-range superfluid coherence is destroyed by pore size distribution or random potential inherent to the porous glass.

Original languageEnglish
Pages (from-to)353-357
Number of pages5
JournalJournal of Low Temperature Physics
Volume150
Issue number3-4
DOIs
Publication statusPublished - 2008 Feb 1

Keywords

  • Bose-Einstein condensation
  • Porous media
  • Quantum phase transition
  • Superfluidity

ASJC Scopus subject areas

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

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