Ultra-strong spin-orbit coupling and topological moire engineering in twisted ZrS₂ bilayers.

ABSTRACT: We predict that twisted bilayers of 1T-ZrS₂ realize a novel and tunable platform to engineer two-dimensional topological quantum phases dominated by strong spin-orbit interactions. At small twist angles, ZrS₂ heterostructures give rise to an emergent and twist-controlled moiré Kagome lattice, combining geometric frustration and strong spin-orbit coupling to give rise to a moiré quantum spin Hall insulator with highly controllable and nearly-dispersionless bands. We devise a generic pseudo-spin theory for group-IV transition metal dichalcogenides that relies on the two-component character of the valence band maximum of the 1T structure at Γ, and study the emergence of a robust quantum anomalous Hall phase as well as possible fractional Chern insulating states from stro

SUBMITTER: Claassen M 

PROVIDER: S-EPMC9395362 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature