Electrical switching of altermagnetism

Abstract

Switching magnetism using only electricity is of great significance for industrial applications but remains challenging. We find that, altermagnetism, as a newly discovered unconventional magnetism, may open an avenue along this effort. Specifically, to have deterministic switching, i.e., reversing current direction must reverse magnetic structure, parity symmetry has to be broken. We discover that, due to their symmetry which depends on chemical environments, altermagnet devices may naturally carry the parity symmetry breaking required for deterministic electrical switching of magnetism. More importantly, we identify MnTe bilayers (Te-Mn-Te-Mn-Te) as candidate devices, with the help of symmetry analysis, first-principles calculations, and magnetic dynamics simulations. This scheme will inspire further explorations on unconventional magnetism.

8 pages, 5 figures

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• Spin-Polarized Josephson Supercurrent in Nodeless Altermagnets
• Engineering subgap states in superconductors by the symmetry of altermagnetism
• Quantum anomalous Hall effect with tunable Chern numbers induced by d-wave sublattice-staggered altermagnetism
• Current switching behavior mediated via hinge modes in higher-order topological phases using altermagnets
• Magnetic precession induced spin accumulation in collinear antiferromagnets
• Spin-Orbit Coupling-Driven Chirality Switching of Spin Waves in Altermagnets
• Antiferroaxial altermagnetism
• Time reversal reserved spin valve and spin transistor based on unconventional $p$-wave magnets