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Spontaneous Anomalous Hall Effect Arising from an Unconventional Compensated Magnetic Phase in a Semiconductor

Gonzalez Betancourt, R. D.; Zubáč, J.; Gonzalez-Hernandez, R.; Geishendorf, K.; Šobáň, Z.; Springholz, G.; Olejník, K.; Šmejkal, L.; Sinova, J.; Jungwirth, T.; Goennenwein, S. T. B.; Thomas, A.; Reichlová, H.; Železný, J.; Kriegner, D.

Authors

R. D. Gonzalez Betancourt

J. Zubáč

R. Gonzalez-Hernandez

K. Geishendorf

Z. Šobáň

G. Springholz

K. Olejník

L. Šmejkal

J. Sinova

TOMAS JUNGWIRTH tomas.jungwirth@nottingham.ac.uk
Research Professor of Ferromagnetic Semiconductors

S. T. B. Goennenwein

A. Thomas

H. Reichlová

J. Železný

D. Kriegner



Abstract

The anomalous Hall effect, commonly observed in metallic magnets, has been established to originate from the time-reversal symmetry breaking by an internal macroscopic magnetization in ferromagnets or by a noncollinear magnetic order. Here we observe a spontaneous anomalous Hall signal in the absence of an external magnetic field in an epitaxial film of MnTe, which is a semiconductor with a collinear antiparallel magnetic ordering of Mn moments and a vanishing net magnetization. The anomalous Hall effect arises from an unconventional phase with strong time-reversal symmetry breaking and alternating spin polarization in real-space crystal structure and momentum-space electronic structure. The anisotropic crystal environment of magnetic Mn atoms due to the nonmagnetic Te atoms is essential for establishing the unconventional phase and generating the anomalous Hall effect.

Citation

Gonzalez Betancourt, R. D., Zubáč, J., Gonzalez-Hernandez, R., Geishendorf, K., Šobáň, Z., Springholz, G., …Kriegner, D. (2023). Spontaneous Anomalous Hall Effect Arising from an Unconventional Compensated Magnetic Phase in a Semiconductor. Physical Review Letters, 130(3), Article 036702. https://doi.org/10.1103/PhysRevLett.130.036702

Journal Article Type Article
Acceptance Date Dec 21, 2022
Online Publication Date Jan 20, 2023
Publication Date Jan 20, 2023
Deposit Date Mar 8, 2024
Journal Physical Review Letters
Print ISSN 0031-9007
Electronic ISSN 1079-7114
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 130
Issue 3
Article Number 036702
DOI https://doi.org/10.1103/PhysRevLett.130.036702
Public URL https://nottingham-repository.worktribe.com/output/17933979
Publisher URL https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.130.036702