论文标题
在掺杂极性SRTIO3膜中的混合元性超导性的可能签名
Possible signatures of mixed-parity superconductivity in doped polar SrTiO3 films
论文作者
论文摘要
具有断裂的空间反演对称性和自旋轨道相互作用的超导体表现出旋转单线和三重态配对的混合物。在这里，我们报告了对电子掺杂的，紧张的SRTIO3膜的超导性能的测量。这些膜具有增强的超导过渡温度，以前被证明在成为超导之前会过渡到极相。我们表明，某些电影显示出异常超导状态的特征，例如平面临界场，高于顺磁性和轨道对破裂极限。此外，观察到反映了奇数与什至配对相互作用的比率的非旋转转运。这些薄膜共同表明，这些薄膜为研究非常规超导性提供了可调节的平台。
Superconductors that possess both broken spatial inversion symmetry and spin-orbit interactions exhibit a mix of spin singlet and triplet pairing. Here, we report on measurements of the superconducting properties of electron-doped, strained SrTiO3 films. These films have an enhanced superconducting transition temperature and were previously shown to undergo a transition to a polar phase prior to becoming superconducting. We show that some films show signatures of an unusual superconducting state, such as an in-plane critical field that is higher than both the paramagnetic and orbital pair breaking limits. Moreover, nonreciprocal transport, which reflects the ratio of odd versus even pairing interactions, is observed. Together, these characteristics indicate that these films provide a tunable platform for investigations of unconventional superconductivity.
