ISIS Neutron and Muon Source Data Journal

Spin excitations in the intrinsic magnetic topological insulator MnBi2Te4

Abstract: Recently, the first intrinsic magnetic topological insulator has been realized in MnBi2Te4. MnBi2Te4 has a tetradymite-type structure with seven-atom layers coupled by the van der Waals interaction along the z direction (e.g., Te1-Bi1-Te2-Mn-Te3-Bi2-Te4), Its magnetic ground state is A-type antiferromagnetic phase with the out-of-plane easy axis and Neel temperature TN=25 K. Here, time-reversal symmetry is broken, but the combination of time reversal and a half-lattice translation connecting nearest spin-up and -down Mn atomic layers is not broken, giving the possible topologically nontrivial phenomena, such as topological axion state, QAH effect, two-dimensional ferromagnetism, etc. To understand the magnetic interactions and thus the interplay between magnetism and topological states in MnBi2Te4, here we propose to do inelastic neutron scattering experiment at MAPS.

Principal Investigator: Dr Hui-Qian Luo
Local Contact: Dr Helen Walker
Experimenter: Mr Zhenyuan Zeng
Experimenter: Miss Chang Liu

DOI: 10.5286/ISIS.E.RB2010066

ISIS Experiment Number: RB2010066

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Dr Hui-Qian Luo et al; (2020): Spin excitations in the intrinsic magnetic topological insulator MnBi2Te4, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2010066

Data is released under the CC-BY-4.0 license.