Electronic correlations stabilizing time-reversal broken chiral superconductivity in single-trilayer TiSe2
Abstract
Bulk TiSe2 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 single trilayer of TiSe2 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 TiSe2.
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