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arXiv 1208.5596cond-mat.supr-concond-mat.str-el
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双层硅烯中的d+id'手性超导电性

d+id' Chiral Superconductivity in Bilayer Silicene

Feng Liu, Cheng-Cheng Liu, Kehui Wu, Fan Yang, Yugui Yao

摘要:

我们通过第一性原理计算研究了无掺杂的双层硅烯的结构和物理性质,发现该体系是具有相当大的口袋费米面的本征金属体系。当真实的电子-电子相互作用打开时,系统被确定为一个由反铁磁自旋密度波阶边界上的强自旋涨落介导的手征d+id'拓扑超导体。此外,通过应变可调的费米口袋面积使得可以调整自旋密度波临界相互作用强度接近真实的,并使高超导临界温度。

英文摘要:

We investigate the structure and physical properties of the undoped bilayer silicene through first-principles calculations and find the system is intrinsically metallic with sizable pocket Fermi surfaces. When realistic electron-electron interaction turns on, the system is identified as a chiral d+id' topological superconductor mediated by the strong spin fluctuation on the border of the antiferromagnetic spin density wave order. Moreover, the tunable Fermi pocket area via strain makes it possible to adjust the spin density wave critical interaction strength near the real one and enables a high superconducting critical temperature.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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