Suppression of freezing and emergence of a novel ordered state in 4He confined in a nano - Porous material

K. Yamamoto, Y. Shibayama, K. Shirahama

研究成果: Conference contribution

5 被引用数 (Scopus)

抄録

Confinement of 4He in a porous material with nanometer - size pores suppresses both the freezing and superfluidity. In our previous investigation of superfluid density of 4He confined in a porous Gelsil glass which has pores of 2.5 nm in diameter, it was demonstrated that the superfluidity is greatly suppressed by pressurization. In order to explore the overall P - T phase diagram, we study the liquid - solid coexistence line. The freezing pressure is elevated up to about 3.4 MPa and independent of temperature below 1.3 K. Along with the previous measurement of superfluid density these features indicate that a nonsuperfluid phase exists next to the solid phase. The flat freezing curve indicates that this nonsuperfluid phase has small entropy as well as that of solid. Therefore the nonsuperfluid phase is possibly a novel ordered state, in which the global phase coherence is destroyed by strong correlation between 4He atoms and/or by random potential.

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349-350
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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