Sivadas Nikhil, Okamoto Satoshi, Xiao Di
Department of Physics, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
Phys Rev Lett. 2016 Dec 23;117(26):267203. doi: 10.1103/PhysRevLett.117.267203.
Using symmetry arguments and a tight-binding model, we show that for layered collinear antiferromagnets, magneto-optic effects can be generated and manipulated by controlling crystal symmetries through a gate voltage. This provides a promising route for electric field manipulation of the magneto-optic effects without modifying the underlying magnetic structure. We further demonstrate the gate control of the magneto-optic Kerr effect (MOKE) in bilayer MnPSe_{3} using first-principles calculations. The field-induced inversion symmetry breaking effect leads to gate-controllable MOKE, whose direction of rotation can be switched by the reversal of the gate voltage.
利用对称性论证和紧束缚模型，我们表明，对于层状共线反铁磁体，可以通过栅极电压控制晶体对称性来产生和操纵磁光效应。这为在不改变底层磁结构的情况下对磁光效应进行电场操纵提供了一条有前景的途径。我们进一步通过第一性原理计算证明了双层MnPSe₃中磁光克尔效应（MOKE）的栅极控制。场致反演对称性破缺效应导致了可由栅极控制的MOKE，其旋转方向可通过反转栅极电压来切换。
