Abstract
Two-dimensional magnetic materials have recently attracted great interest due to their unique functions as the electric field control of a magnetic phase and the anomalous spin Hall effect. For such remarkable functions, a spin-orbit coupling (SOC) serves as an essential ingredient. Here we report a giant positive magnetoresistance in a layered magnetic semiconductor , which is a manifestation of the subtle combination of the SOC and Zeeman-type spin splitting. When the carrier concentration, , approaches the critical value of , a sizable positive magnetoresistance of emerges upon the application of magnetic fields normal to the conducting layers. Based on the magneto-Seebeck effect and the first-principles calculations, the unconventional magnetoresistance is ascribable to the enhancement of effective carrier mass in the SOC-induced state, which is tuned to the Fermi level through the Zeeman splitting enhanced by the coupling. This study demonstrates an aspect of the SOC-derived magnetotransport in two-dimensional magnetic semiconductors, paving the way to spintronic functions.
- Received 25 March 2022
- Revised 26 April 2022
- Accepted 4 May 2022
DOI:https://doi.org/10.1103/PhysRevMaterials.6.054602
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