Thermodynamic evidence for nanoscale bose-einstein condensation in He4 confined in nanoporous media

Keiichi Yamamoto, Yoshiyuki Shibayama, Keiya Shirahama

研究成果: Article

35 被引用数 (Scopus)

抄録

We report the measurements of the heat capacity of He4 confined in nanoporous Gelsil glass that has nanopores of 2.5-nm diameter at pressures up to 5.3 MPa. The heat capacity has a broad peak at a temperature much higher than the superfluid transition temperature obtained using the torsional oscillator technique. The peak provides definite thermodynamic evidence for the formation of localized Bose-Einstein condensates on nanometer length scales. The temperature dependence of the heat capacity is described well by the excitations of phonons and rotons, supporting the existence of localized Bose-Einstein condensates.

本文言語English
論文番号195301
ジャーナルPhysical review letters
100
19
DOI
出版ステータスPublished - 2008 5 15

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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