Realization of the Axion Insulator State in Quantum Anomalous Hall Sandwich Heterostructures
Realization of the Axion Insulator State in Quantum Anomalous Hall Sandwich Heterostructures
The "magnetoelectric effect" arises from the coupling between magnetic and electric properties in materials. The Z2 invariant of topological insulators (TIs) leads to a quantized version of this phenomenon, known as the topological magnetoelectric (TME) effect. This effect can be realized in a new topological phase called an "axion insulator" …