4He in nano-porous media: Superfluidity and quantum phase transition

研究成果: Review article

14 被引用数 (Scopus)

抄録

This paper reviews recent findings of novel phenomena in 4He confined to a nano-porous glass. We examined pressure-temperature (P-T) phase diagram of 4He confined in a porous Gelsil glass that had nanopores 2.5 nm in diameter, by torsional oscillator and pressure studies. The obtained phase diagram is fairly unprecedented: the superfluid transition temperature approaches zero at 3.4 MPa, and a novel nonsuperfluid phase exists between the superfluid and solid phase. These observations indicate that the confined 4He undergoes a superfluid-nonsuperfluid-solid quantum phase transition at zero temperature. We propose that the nonsuperfluid phase may be a localized Bose-condensed state in which global phase coherence is destroyed by a strong correlation between the 4He atoms or by a random potential. 4He in nanospace is an excellent model system for studying a strongly correlated Bose liquid and solid in a confinement potential.

本文言語English
ページ(範囲)485-497
ページ数13
ジャーナルJournal of Low Temperature Physics
146
5-6
DOI
出版ステータスPublished - 2007 3 1

ASJC Scopus subject areas

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

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