Superfluidity of 4He adsorbed on nanoporous activated carbon fibers

Yoshiyuki Shibayama, Keiya Shirahama

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

4He confined in nanoporous media is one of the most interesting nano-sized systems in the context of an interacting Bose system. In the present work, we study superfluidity of 4He adsorbed in nanoporous activated carbon fibers (ACFs). Up to a 4He coverage of n = 22.6 μmol m -2, no superfluidity is observed. Over 23.7 μmol m -2, superfluid transition is observed at T c ∼ 550 mK. With an increase in n the superfluid density enhances, but T c is independent of n. These observations indicate that the thickness of the superfluid 4He films on the pore wall is restricted by a slit type pore shape of ACFs.

Original languageEnglish
Pages (from-to)809-813
Number of pages5
JournalJournal of Low Temperature Physics
Volume148
Issue number5-6
DOIs
Publication statusPublished - 2007 Sep 1

ASJC Scopus subject areas

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

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