Giant strain-induced spin splitting effect in MnTe, a $g$-wave altermagnetic semiconductor

Abstract

Hexagonal MnTe is an altermagnetic semiconductor with $g$-wave symmetry of spin polarization in momentum space. In the nonrelativistic limit, this symmetry mandates that electric current flowing in any crystallographic direction is unpolarized. However, it is shown that elastic strain is effective in inducing the spin splitting effect in MnTe. For this analysis, a spin-orbit-coupled $\mathbf{k}\cdot \mathbf{p}$ Hamiltonian for the valence band maximum at the A point is derived and fitted to eigenvalues calculated from first principles. The spin splitting angle is calculated using the Boltzmann approach in the relaxation-time approximation. The spin splitting gauge factor exceeds 20 near the valence band maximum. Thus, with suitable substrate engineering, MnTe can be used as an efficient source and detector of spin current in spintronic devices. Proper inclusion of the Rashba-Dresselhaus spin-orbit coupling is crucial for the correct description of the transport properties of MnTe.

arXiv comment7 pages, 3 figures

References in corpus (17)

• Current-induced spin-orbit torques in ferromagnetic and antiferromagnetic systems
• Altermagnetism: spin-momentum locked phase protected by non-relativistic symmetries
• Giant momentum-dependent spin splitting in centrosymmetric low Z antiferromagnets
• Efficient Electrical Spin-Splitter Based on Non-Relativistic Collinear Antiferromagnetism
• Momentum-Dependent Spin Splitting by Collinear Antiferromagnetic Ordering
• Multifunctional Antiferromagnetic Materials with Giant Piezomagnetism and Noncollinear Spin Current
• Observation of spin splitting torque in a collinear antiferromagnet RuO2
• Broken Kramers' degeneracy in altermagnetic MnTe
• Spontaneous anomalous Hall effect arising from an unconventional compensated magnetic phase in a semiconductor
• Observation of spin-splitter torque in collinear antiferromagnetic RuO${}_2$
• Observation of Giant Band Splitting in Altermagnetic MnTe
• Chiral-Split Magnon in Altermagnetic MnTe
• Magnetic anisotropy in antiferromagnetic hexagonal MnTe
• Minimal Models for Altermagnetism
• Sensitivity of the MnTe valence band to orientation of magnetic moments
• Antiferromagnetism, spin splitting, and spin-orbit interaction in MnTe
• A historical introduction to the symmetries of magnetic structures: Part 1. Early quantum theory, neutron powder diffraction and the colored space groups

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