Electronic correlations stabilizing time-reversal broken chiral   superconductivity in single-trilayer TiSe$_2$
  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$_2$. 
R. Ganesh, G. Baskaran, Jeroen van den Brink, and Dmitry V. Efremov
cond-mat.supr-con