Shear resonance and torsional oscillator measurements of solid 4He under dc rotation

被引：4

作者：

Choi, W. ^{[1
,2
]}

Takahashi, D. ^{[3
]}

Kim, D. Y. ^{[1
,2
]}

Choi, H. ^{[1
,2
]}

Kono, K. ^{[3
]}

Kim, E. ^{[1
,2
]}

机构：

[1] Korea Adv Inst Sci & Technol, Ctr Supersolid & Quantum Matter Res, Taejon 305701, South Korea

[2] Korea Adv Inst Sci & Technol, Dept Phys, Taejon 305701, South Korea

[3] RIKEN, Low Temp Phys Lab, Wako, Saitama 3510198, Japan

来源：

PHYSICAL REVIEW B | 2012年 / 86卷 / 17期

基金：

新加坡国家研究基金会;

关键词：

SUPERSOLIDITY; HELIUM;

D O I：

10.1103/PhysRevB.86.174505

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nonclassical response and acoustic resonance of a torsional oscillator (TO) containing solid helium is investigated under dc rotation. Acoustic resonance measurements can capture the elastic property of solid helium in the annular channel where we simultaneously measure the torsional oscillator response. Superposition of dc rotation on top of two resonance measurements can clarify whether or not the reduction in the resonant period of the TO is originated from the elastic property of solid helium more clearly. We find that the acoustic resonance is independent of dc rotation. On the contrary, the TO response measured simultaneously shows strong suppression which was accompanied by additional dissipation of the TO. This study supports the existence of a macroscopically phase coherent superfluid state in solid helium.

引用

页数：4

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