单-三层TiSe $_2$中稳定时间反转破缺手征超导电性的电子关联
Electronic correlations stabilizing time-reversal broken chiral superconductivity in single-trilayer TiSe$_2$
摘要：
块体TiSe $_2$是一种具有超导有序性和电荷密度波有序性的过渡金属二硫属化物（TMD）。受二维TMD制备的最新进展的启发，我们在重整化群方法中研究了TiSe $_2$的{\it single}三层中的这些阻挫有序。我们建立了一个新的状态与时间反演对称性破缺手征超导可以出现的强竞争之间的CDW形成和超导性。其稳定性依赖于二维TiSe $_2$中电子-电子相互作用的精确强度和屏蔽。
英文摘要：
Bulk TiSe$_2$ is an intrinsically layered transition metal dichalcogenide (TMD) hosting both superconducting and charge density wave (CDW) ordering. Motivated by the recent progress in preparing two-dimensional TMDs, we study these frustrated orderings in {\it single} trilayer of TiSe$_2$ within a renormalization group approach. We establish that a novel state with time-reversal symmetry broken chiral superconductivity can emerge from the strong competition between CDW formation and superconductivity. Its stability depends on the precise strength and screening of the electron-electron interactions in two-dimensional TiSe$_2$.
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