Tuning Ising superconductivity with layer and spin-orbit coupling in two-dimensional transition-metal dichalcogenides.
Tuning Ising superconductivity with layer and spin-orbit coupling in two-dimensional transition-metal dichalcogenides.
复制标题
DOI：
10.1038/s41467-018-03888-4
复制
发表时间：
2018-04-12
影响因子：
16.6
通讯作者：
Hunt BM
中科院分区：
文献类型：
--
作者：
de la Barrera SC;Sinko MR;Gopalan DP;Sivadas N;Seyler KL;Watanabe K;Taniguchi T;Tsen AW;Xu X;Xiao D;Hunt BM
同时表现出超导性和自旋轨道耦合的系统被预测为拓扑超导性和非常规电子配对提供了一条途径，推动了当代对这些材料的重大兴趣。单层过渡金属二硫族化物（TMD）超导体特别缺乏反转对称性，产生了自旋轨道耦合的反对称形式，允许超导波函数的自旋单线态和自旋三线态分量。在这里，我们提出了一个实验和理论研究的两个本征TMD超导体的大自旋轨道耦合在原子层的限制，金属2 H-TaS 2和2 H-NbSe 2。我们调查的超导性能的材料减少到单层厚度，并表明，高场测量点的最大的上临界场，从而报告的本征TMD超导体。在少层样品中，我们发现上临界场的增强是由自旋-轨道耦合对弱层间耦合的主导作用所维持的，这为支持二维非常规超导态提供了额外的候选系统。单层过渡金属二硫属化物（TMD）具有良好的拓扑超导电性。在这里，de la Barrera等人研究了层状化合物，2 H-TaS 2和2 H-NbSe 2，在它们的原子层极限中，发现了本征TMD超导体的最大上临界场。
Systems simultaneously exhibiting superconductivity and spin–orbit coupling are predicted to provide a route toward topological superconductivity and unconventional electron pairing, driving significant contemporary interest in these materials. Monolayer transition-metal dichalcogenide (TMD) superconductors in particular lack inversion symmetry, yielding an antisymmetric form of spin–orbit coupling that admits both spin-singlet and spin-triplet components of the superconducting wavefunction. Here, we present an experimental and theoretical study of two intrinsic TMD superconductors with large spin–orbit coupling in the atomic layer limit, metallic 2H-TaS2 and 2H-NbSe2. We investigate the superconducting properties as the material is reduced to monolayer thickness and show that high-field measurements point to the largest upper critical field thus reported for an intrinsic TMD superconductor. In few-layer samples, we find the enhancement of the upper critical field is sustained by the dominance of spin–orbit coupling over weak interlayer coupling, providing additional candidate systems for supporting unconventional superconducting states in two dimensions. Monolayer transition-metal dichalcogenide (TMD) is promising to host features of topological superconductivity. Here, de la Barrera et al. study layered compounds, 2H-TaS2 and 2H-NbSe2, in their atomic layer limit and find a largest upper critical field for an intrinsic TMD superconductor.
登录
查看更多内容
影响因子：
3.7
作者：
Kresse, G;Furthmuller, J
通讯作者：
Furthmuller, J
影响因子：
8.6
作者：
Frigeri, PA;Agterberg, DF;Sigrist, M
通讯作者：
Sigrist, M
影响因子：
8.6
作者：
Ilic, Stefan;Meyer, Julia S.;Houzet, Manuel
通讯作者：
Houzet, Manuel
DOI：
10.1016/j.physc.2015.02.023
发表时间：
2015-07-15
影响因子：
1.7
作者：
Klemm, Richard A.
通讯作者：
Klemm, Richard A.
影响因子：
4
作者：
CHANDRASEKHAR, BS
通讯作者：
CHANDRASEKHAR, BS