Ultrasonic study of superfluidity of 4He in a nanoporous glass

T. Kobayashi, S. Fukazawa, J. Taniguchi, M. Suzuki, K. Shirahama

研究成果: Conference contribution

3 被引用数 (Scopus)

抄録

Recently, Yamamoto et al. have carried out torsional oscillator measurements for 4He filled in a nanoporous glass containing pores 2.5 nm in diameter (Gelsil), and reported a large suppression of superfluidity at high pressures. In order to study the mechanism of the superfluid suppression, we have carried out ultrasonic measurements for 4He filled in the same nanoporous glass. We have clearly observed an increase in the sound velocity due to decoupling of the superfluid component. At zero pressure, the superfluid transition temperature TC is suppressed to 1.4 K from the bulk lambda point, 2.17 K. The pressure dependence of TC and the temperature dependence of the superfluid fraction are very different from those reported by Yamamoto et al.

本文言語English
ホスト出版物のタイトルLOW TEMPERATURE PHYSICS
ホスト出版物のサブタイトル24th International Conference on Low Temperature Physics - LT24
ページ277-278
ページ数2
DOI
出版ステータスPublished - 2006 12 1
イベントLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24 - Orlando, FL, United States
継続期間: 2006 8 102006 10 17

出版物シリーズ

名前AIP Conference Proceedings
850
ISSN(印刷版)0094-243X
ISSN(電子版)1551-7616

Other

OtherLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24
国/地域United States
CityOrlando, FL
Period06/8/1006/10/17

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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