Spin-Dependent Acoustic Response in the Nonunitary A1 and A2 Phases of Superfluid He3 under High Magnetic Fields
Spin-Dependent Acoustic Response in the Nonunitary A1 and A2 Phases of Superfluid He3 under High Magnetic Fields
复制标题
高磁场下超流体 He3 非单一 A1 和 A2 相的自旋相关声响应
DOI：
10.1103/physrevlett.114.105304
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发表时间：
2015
影响因子：
8.6
通讯作者：
and K. Nagai
中科院分区：
文献类型：
--
作者：
S. Murakawa;A. Yamaguchi;M. Arai;M. Wasai;Y. Aoki;H. Ishimoto;R. Nomura;Y. Okuda;Y. Nagato;S. Higashitani;and K. Nagai
为了研究非么正超流体的表面态，测量了超流体在13 T以下的横向声阻抗。阻抗的温度依赖性在相位中比在相位中大得多。这种非对称行为表明，自旋向下的表面态与壁的动量交换是完全不同的自旋向上的表面态。自旋相关的响应可能是非幺正态的一个基本特征的反映，其中间隙振幅取决于自旋状态。弱耦合理论忽略了任何自旋相关的过程，并且不考虑非对称行为。
The transverse acoustic impedance of superfluidwas measured in theandphases up to 13 T to investigate the surface states in nonunitary superfluids. The temperature dependence of the impedance was much larger in thephase than in thephase. This nonsymmetric behavior indicates that momentum exchange with walls for spin-down surface states is quite different from that for spin-up surface states. The spin-dependent response might be a reflection of an essential feature of the nonunitary states where gap amplitudes depend on spin states. Weak-coupling theories ignore any spin-dependent processes and do not account for the nonsymmetric behavior.