论文标题
扭曲的双层过渡金属甲藻元中的配对密度波和手性超导性
Pair-density-wave and chiral superconductivity in twisted bilayer transition-metal-dichalcogenides
论文作者
论文摘要
从理论上讲，我们从理论上探讨了在扭曲的双层TMD（例如WSE $ _2 $）中造成的非常规超导性。使用重新归一化组（RG）分析，我们表明，具有Chern Number $ \ Mathcal {N} = 1,2,4 $的拓扑性手性超导状态（即$ P+IP $，$ d+id $，$ g+ig $）出现在带有Moire填充因子左右的大型参数区域上。在某些特殊值的电场和弱面外采地场上，自旋偏置对密度波（PDW）超导性可能会出现。可以通过实验（例如测量自旋分辨配对间隙和准粒子干扰）探测这种自旋偏振状态的PDW状态。此外，自旋偏振的PDW可能导致自旋偏振超导二极管效应。
We theoretically explore possible unconventional superconductivity induced by weak repulsive interactions in twisted bilayer TMD (e.g. WSe$_2$) in the presence of an out-of-plane electric field. Using renormalization group (RG) analysis, we show that topological chiral superconducting states with Chern number $\mathcal{N}=1,2,4$ (namely $p+ip$, $d+id$, $g+ig$) appear over a large parameter region with moire filling factor around $n=1$. At some special values of applied electric field and in the presence of a weak out-of-plane Zeeman field, spin-polarized pair density wave (PDW) superconductivity can emerge. This spin-polarized PDW state can be probed by experiments such as spin-polarized STM measuring spin-resolved pairing gap and quasi-particle interference. Moreover, the spin-polarized PDW could lead to spin-polarized superconducting diode effect.
