论文标题
超过Pauli在批量NBS2中的极限之外的超导性：Fulde-Ferrell-Larkin-Ovchinnikov State的证据
Superconductivity beyond Pauli's limit in bulk NbS2: Evidence for the Fulde-Ferrell-Larkin-Ovchinnikov state
论文作者
论文摘要
我们提出了磁性扭矩，比热和热膨胀测量结果，结合了在高磁场中严格平行于其层结构的散装过渡金属二甲化合物（TMD）超导体NBS2的压电旋转定位器。已知以2D形式的超导TMD的上部临界场通过一种特殊形式的旋转轨道耦合来显着增强。对于超导性的保利极限，这种超导性非常强大。我们发现，超过Pauli极限以外的超导性仍然存在于NBS2的散装单晶中。但是，我们的上临界场过渡线与数值模拟的比较，而是指出了富德 - 弗雷尔 - 弗雷尔·洛尔金·埃弗基尼科夫状态的发展，这是一个原因。这也与在保利极限附近的超导状态内的热力学量中磁场驱动的相变的观察也是一致的。
We present magnetic torque, specific heat and thermal expansion measurements combined with a piezo rotary positioner of the bulk transition metal dichalcogenide (TMD) superconductor NbS2 in high magnetic fields applied strictly parallel to its layer structure. The upper critical field of superconducting TMDs in the 2D form is known to be dramatically enhanced by a special form of Ising spin orbit coupling. This Ising superconductivity is very robust against the Pauli limit for superconductivity. We find that superconductivity beyond the Pauli limit still exists in bulk single crystals of NbS2. However, the comparison of our upper critical field transition line with numerical simulations rather points to the development of a Fulde-Ferrell-Larkin-Ovchinnikov state above the Pauli limit as a cause. This is also consistent with the observation of a magnetic field driven phase transition in the thermodynamic quantities within the superconducting state near the Pauli limit.
