论文标题
非中心对称塔鲁西的非职业三胞胎超导性的证据以及与等式塔雷西的比较的证据
Evidence for non-unitary triplet-pairing superconductivity in noncentrosymmetric TaRuSi and comparison with isostructural TaReSi
论文作者
论文摘要
我们已经研究了借助MUON自旋旋转/松弛/弛豫（$μ$ SR）和密度功能理论计算，研究了同构三元非中心超级导体税（x = re，ru）的超导特性。我们的横向场$μ$ $ SR的测量表明，塔雷西（Taresi）和多间隙超导性的各向同性S波超导性。零场$ $ $ $ SR的测量值，对非常小的磁场高度敏感，也没有证据表明塔雷西超导状态中的自发场，而我们观察到以超导性发作的小自发性磁场表明，时间逆向对称性（TRS）超导性（TRS）超导电性的超导电性在tarusi tarusi tarusi tarusi tarusi tarusi tarusci。使用密度函数理论计算，我们发现自旋轨道耦合在Tarusi中相对较弱，而在Taresi中则很强。使用对称分析，我们将Tarusi中损坏的时间反转对称性（TRS）归因于非单身三胞胎配对状态。在存在强旋转轨道耦合的情况下，不允许这样的状态：我们发现Taresi中TR损坏的证据与这种期望是一致的。
We have studied the superconducting properties of the isostructural ternary noncentrosymmetric superconductors TaXSi (X = Re, Ru) with the help of muon spin rotation/relaxation ($μ$SR) and density functional theory calculations. Our transverse-field $μ$SR measurements indicate isotropic s-wave superconductivity in TaReSi and multi-gap superconductivity in TaRuSi. Zero-field $μ$SR measurements, highly sensitive to very small magnetic fields, and no evidence for spontaneous fields in the superconducting state of TaReSi, whereas we observe small spontaneous fields that onset with superconductivity indicating broken time-reversal symmetry (TRS) superconductivity in TaRuSi. Using density functional theory calculations, we find that spin-orbit coupling is relatively weak in TaRuSi and strong in TaReSi. Using symmetry analysis, we attribute the broken time-reversal symmetry (TRS) in TaRuSi to a non-unitary triplet pairing state. Such a state is not allowed in the presence of strong spin-orbit coupling: our finding of no evidence for broken TRS in TaReSi is consistent with this expectation.
