Abstract
(MnGa) with the structure is a ferromagnetic material with strong perpendicular magnetocrystalline anisotropy. Although MnGa thin films have been successfully grown epitaxially and studied for various spintronics devices, fundamental understandings of its electronic structure are still lacking. To address this issue, we have investigated -MnGa thin films using angle-resolved photoemission spectroscopy (ARPES). We have observed a large Fermi surface with a rhombic shape in the plane overlapping neighboring Fermi surfaces. The dependence of the band structure suggests that the band dispersion observed by ARPES comes from the three-dimensional band structure of MnGa folded by a reconstruction. The band dispersion across the corner of the rhombic Fermi surface forms an electron pocket with a weak dependence. The effective mass and the mobility of the bands crossing the Fermi level near the corner are estimated from the ARPES images. Based on the experimental findings, the relationship between the observed band structure and the spin-dependent properties in MnGa-based heterostructures is discussed.
- Received 1 March 2022
- Revised 4 June 2022
- Accepted 22 June 2022
DOI:https://doi.org/10.1103/PhysRevMaterials.6.074403
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