Search of superfluidity of solid 4He in a porous Vycor glass by means of the ultrasound technique

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

研究成果: Conference contribution

4 被引用数 (Scopus)

抄録

Kim and Chan have reported that solid 4He shows a reduction of the rotational moment of inertia below 0.2 K, which suggests an onset of superfluidity. Ultrasound should be sensitive to mass decoupling caused by superfluidity. If a superfluid component exists, the sound velocity of a porous material filled with solid 4He could increase. We have carried out ultrasonic measurements for a porous Vycor glass filled with solid 4He. Since the reported "critical velocity" is very low, we have adopted a continuous wave resonance technique which realizes the oscillating velocity less than 1 × 10-7 m/s. The resolution of the sound velocity is 10-5 for small oscillating velocities, and is enough to detect the expected mass decoupling. Although the present experimental conditions are rather limited, no signature of supersolid has been observed.

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333-334
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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