Speaker
Glenn Wagner
Description
The recent experimental observations of fractional Chern insulators in moiré systems without an applied magnetic field prompt the question of whether their time-reversal invariant generalization, fractional topological insulators (FTIs), can also be realized in these platforms. Using comprehensive exact diagonalization calculations on twisted bilayer MoTe2 at nu=-4/3 and an idealized Landau level model, we conjecture that FTIs can be obtained under realistic conditions, and extract general principles for engineering such exotic phases. Our analysis accounts for microscopic details such as band-mixing and anisotropic non-local dielectric screening.
Authors
Andrei Bernevig
Glenn Wagner
Jiabin Yu
Kouta Dagnino
Titus Neupert
Yves Kwan
