Persistence of charge ordering instability to Coulomb engineering in the excitonic insulator candidate TiSe${}_2$

Sebastian Buchberger, Yann in 't Veld, Akhil Rajan +11

TiSe${}_2$ has long been considered one of the best candidate materials to host the elusive excitonic insulator (EI) phase. However, a finite coupling to the lattice can generically…