Regarding the existence of abelian fractional topological insulators in twisted MoTe₂ and related systems.

ABSTRACT: The experimental discovery of fractional Chern insulators (FCIs) in moiré materials raises the question of whether their time-reversal invariant analogs, fractional topological insulators (FTIs), can also be realized in these platforms. We address this via exact diagonalization calculations in both a Landau level (LL) model and continuum model for twisted MoTe₂, and extract principles for engineering FTIs in realistic conditions. For the spinful LL model at filling ν=13+13 , we show that a suppression of the short-range component of the interaction is important to stabilize the FTI. For twisted MoTe₂ at ν=-43 , we find that a short-range attraction g on top of the screened Coulomb interaction is needed to realize an FTI. We discuss how this threshold value of <

SUBMITTER: Kwan YH 

PROVIDER: S-EPMC12893902 | biostudies-literature | 2026

REPOSITORIES: biostudies-literature