Band structure of CuMnAs probed by optical and photoemission spectroscopy

Abstract

Tetragonal phase of CuMnAs progressively appears as one of the key materials for antiferromagnetic spintronics due to efficient current-induced spin-orbit torques whose existence can be directly inferred from crystal symmetry. Theoretical understanding of spintronic phenomena in this material, however, relies on the detailed knowledge of electronic structure (band structure and corresponding wave functions) which has so far been tested only to a limited extent. We show that AC permittivity (obtained from ellipsometry) and UV photoelectron spectra agree with density functional calculations. Together with the x-ray diffraction and precession electron diffraction tomography, our analysis confirms recent theoretical claim [Phys.Rev.B 96, 094406 (2017)] that copper atoms occupy lattice positions in the basal plane of the tetragonal unit cell.

arXiv comment5 pages, 5 figures + Supplementary Information

References in corpus (10)

• Antiferromagnetic spintronics
• Antiferromagnetic spintronics
• Electrical switching of an antiferromagnet
• Relativistic Neel-order fields induced by electrical current in antiferromagnets
• Tetragonal phase of epitaxial room-temperature antiferromagnet CuMnAs
• Intraband and interband spin-orbit torques in non-centrosymmetric ferromagnets
• Piezo-Magneto-Electric Effects in p-Doped Semiconductors
• Can disorder alone destroy the eg' hole pockets of NaxCoO2? A Wannier function based first-principles method for disordered systems
• Magnetic order induces symmetry breaking in the single crystalline orthorhombic CuMnAs semimetal
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• Electrical transport properties of bulk tetragonal CuMnAs
• Investigation of Magnetic Anisotropy and Heat Dissipation in Thin Films of Compensated Antiferromagnet CuMnAs by Pump-probe Experiment
• Atomic photoionization cross-sections beyond the electric dipole approximation
• The stability and physical properties of the tetragonal phase of bulk CuMnAs antiferromagnet
• Perpendicular magnetic anisotropy in bulk and thin-film CuMnAs for antiferromagnetic memory applications
• Polar magneto-optical Kerr effect in antiferromagnetic M${}_2$As (M=Cr, Mn, Fe) under an external magnetic field
• Room temperature weak collinear ferrimagnet with symmetry driven, large intrinsic magneto-optic signatures
• Antiferromagnetic CuMnAs: Ab initio description of finite temperature magnetism and resistivity
• Antiferromagnetism and spin density waves in 3D Dirac semimetals
• Single crystal studies and electronic structure investigation of a room-temperature semiconductor NaMnAs
• High-resolution diffraction reveals magnetoelastic coupling and coherent phase separation in tetragonal CuMnAs