Tunable Quantum Anomalous Hall Effects in van der Waals Heterostructures (IMAGE)

Science China Press

Tunable Quantum Anomalous Hall Effects in van der Waals Heterostructures

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Figure (a) Crystal structure of Bi/MnBi2Te4 vdW heterostructure. (b) Schematic diagram showing controllable magnetism and topological phase transition in the material. The magnetization orientation (Mi: i=x, y,z; red arrows) is tunable by applying strain (denoted by purple arrows) or magnetic field. QAH states with controllable Chern numbers are realized by changing the magnetization orientation or twisting the vdW heterostructure.

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