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Published on: August 15, 2018
Electrical Switching of Altermagnetism
Yiyuan Chen1, Xiaoxiong Liu1, Hai-Zhou Lu1,2
1Southern University of Science and Technology (SUSTech), State Key Laboratory of Quantum Functional Materials, Department of Physics, and Guangdong Basic Research Center of Excellence for Quantum Science, Shenzhen 518055, China.
None:
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.
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