Topological Electronic Structure and Its Temperature Evolution in Antiferromagnetic Topological Insulator MnBi2Te4

Understand

Topological quantum materials coupled with magnetism can provide a platform for realizing rich exotic physical phenomena, including quantum anomalous Hall effect, axion electrodynamics and Majorana fermions.

• However, these unusual effects typically require extreme experimental conditions such as ultralow temperature or sophisticate material growth and fabrication.
• Recently, new intrinsic magnetic topological insulators were proposed in MnBi2Te4-family compounds - on which rich topological effects could be realized under much relaxed experimental conditions.
• However, despite the exciting progresses, the detailed electronic structures observed in this family of compounds remain controversial up to date.