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Journal Article

Electric-field switching of magnetic topological charge in type-I multiferroics


Tan,  Hengxin
Nano-Systems from Ions, Spins and Electrons, Max Planck Institute of Microstructure Physics, Max Planck Society;

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Xu, C., Chen, P., Tan, H., Yang, Y., Xiang, H., & Bellaiche, L. (2020). Electric-field switching of magnetic topological charge in type-I multiferroics. Physical Review Letters, 125(3): 037203. doi:10.1103/PhysRevLett.125.037203.

Cite as: http://hdl.handle.net/21.11116/0000-0008-834C-F
Applying electric field to control magnetic properties is a very efficient way for spintronics devices. However, the control of magnetic characteristics by electric fields is not straightforward, due to the time-reversal symmetry of magnetism versus spatial inversion symmetry of electricity. Such fundamental difficulty makes it challenging to modify the topology of magnetic skyrmionic states with electric field. Here, we propose a novel mechanism that realizes the electric-field (E) switching of magnetic topological charge (Q) in a controllable and reversible fashion, through the mediation of electric polarization (P) and Dzyaloshinskii-Moriya interaction (D). Such a mechanism is coined here EPDQ. Its validity is demonstrated in a multiferroic VOI2 monolayer, which is predicted to host magnetic bimerons. The change in magnetic anisotropy is found to play a crucial role in realizing the EPDQ process and its microscopic origin is discussed. Our study thus provides a new approach toward the highly desired electric-field control of magnetism.