Time and place: 2019.11.13, 15:00 pm, Wuhan National High Magnetic Field Center B206

Presenter: Ke He

Title: The road to high temperature quantum anomalous Hall effect in magnetic topological insulators

Abstract：

The quantum anomalous Hall effect is a quantum Hall effect that can occur without applied magnetic field. The effect has been experimentally realized in magnetically doped topologically insulators, but usually an ultralow temperature below 100mK is required to observe full quantization of the anomalous Hall resistance and vanishing longitudinal resistance. Elevating the temperature to realize the quantum anomalous Hall effect to above 77K or higher is crucial for its practical applications in electronics. In this talk, I will review the progresses in the past years on searching for higher temperature quantum anomalous Hall systems. Based on our understandings on these results, especially recent ones on magnetically intercalated topological insulators, we will give the principles and a roadmap for designing and constructing materials to realize high temperature quantum anomalous Hall effect.