Fractional quantum anomalous Hall states in twisted bilayer <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>MoTe</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>WSe</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math>
Aidan P. Reddy, Faisal Alsallom, Yang Zhang, Trithep Devakul, Liang Fu
Abstract
The recent observation of the fractional quantum anomalous Hall effect opens a new frontier in topological phases and quantum materials. Here, the authors demonstrate that the strong interaction in partially filled topological moir\'e bands of twisted semiconductor bilayers induces a variety of phases, including ferromagnetic metals, charge density waves, and fractional quantum anomalous Hall states. This work reveals a remarkably rich phase diagram as a function of twist angle, awaiting further exploration.
Topics & Concepts
Quantum Hall effectCondensed matter physicsPhase diagramPhysicsPhase (matter)Quantum mechanicsMagnetic fieldTopological Materials and PhenomenaGraphene research and applicationsQuantum and electron transport phenomena