Liquid-solid transition and phase diagram of 4He confined in nanoporous glass

Keiichi Yamamoto, Yoshiyuki Shibayama, Keiya Shirahama

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26 Citations (Scopus)


We have studied the liquid-solid (L-S) phase transition of 4He confined in nanoporous Gelsil glass that has interconnected nanopores of 2.5-nm diameter. The L-S boundary is determined by a series of measurements of pressure versus temperature along isochores and the rate of temperature change during slow cooling and warming in a semi-adiabatic condition. Below 1K, the freezing pressure is elevated by 1.2 MPa from the bulk freezing pressure, and appears to be independent of temperature. The T-independent freezing pressure strongly suggests the existence of the localized Bose-Einstein condensation state.

Original languageEnglish
Article number013601
JournalJournal of the Physical Society of Japan
Issue number1
Publication statusPublished - 2008 Jan


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

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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