Effect of Magnetic Impurities on Superfluid He3
Effect of Magnetic Impurities on Superfluid He3
复制标题
磁性杂质对超流He3的影响
DOI：
10.1103/physrevlett.124.025302
复制
发表时间：
2020
影响因子：
8.6
通讯作者：
Halperin, W. P.
中科院分区：
文献类型：
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作者：
Zimmerman, A. M.;Nguyen, M. D.;Scott, J. W.;Halperin, W. P.
众所周知，磁性和非磁性杂质都抑制非常规超导性。在这里，我们比较了它们对范例非常规超导体、超流体的影响，使用高度稀释的二氧化硅气凝胶。通过在气凝胶表面涂上一层。我们发现对转变温度本身的影响很小。然而，我们发现打破时间反转对称的相位受到强烈影响，而各向同性相位不变。重要的是，只有当杂质在全球范围内呈各向异性分布时，才会发生这种情况。
It is known that both magnetic and nonmagnetic impurities suppress unconventional superconductivity. Here we compare their effect on the paradigm unconventional superconductor, superfluid, using highly dilute silica aerogel. Switching magnetic to nonmagnetic scattering in the same physical system is achieved by coating the aerogel surface with. We find a marginal influence on the transition temperature itself. However, we have discovered that thephase, which breaks time reversal symmetry, is strongly influenced, while the isotropicphase is unchanged. Importantly, this occurs only if the impurities are anisotropically distributed on a global scale.