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タイトル
和文: 
英文:Pressure dependence of Transverse Acoustic Response of Superfluid He-B 
著者
和文: 和田 雄一郎, 青木 悠樹, M. Saitoh, R. Nishida, 野村 竜司, 奥田 雄一.  
英文: Y. Wada, Y. Aoki, M. Saitoh, R. Nishida, R. Nomura, Y. Okuda.  
言語 English 
掲載誌/書名
和文: 
英文:AIP Conf. Proc. 
巻, 号, ページ Vol. 850        pp. 91
出版年月 2006年9月 
出版者
和文: 
英文: 
会議名称
和文: 
英文:LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24 
開催地
和文: 
英文: 
DOI https://doi.org/10.1063/1.2354619
アブストラクト We measured the pressure dependence of the complex transverse acoustic impedance of superfluid 3He-B using an AC-cut quartz transducer. The measurements were performed by a CW bridge method at the third harmonics of the fundamental resonance frequency 9.56 MHz. We obtained the real (Z') and the imaginary (Z'') parts of the transverse acoustic impedance independently. Z' and Z'' did not change from the normal state values at Tc, but Z' started to increase at the pair breaking edge temperature Tpb upon cooling. The slope of the increase changed at a temperature defined as T* which was lower than Tpb. With further cooling, it reached a maximum and then decreased slowly. Z'' had a small peak at T* and decreased rapidly with decreasing temperature. These temperature dependences were possibly influenced by quasi-particle density of states within the energy gap originating from the surface Andreev bound states. At lower pressure the maximum of Z' and the small peak of Z'' moved to smaller T/Tc and became larger due to the pressure dependence of the energy gap.

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