首页|Symmetry transformation of nonlinear optical current of tilted Weyl nodes and application to ferromagnetic MnBi2Te4
Symmetry transformation of nonlinear optical current of tilted Weyl nodes and application to ferromagnetic MnBi2Te4
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A Weyl node is characterized by its chirality and tilt.We develop a theory of how nth-order nonlinear optical conduc-tivity behaves under transformations of anisotropic tensor and tilt,which clarifies how chirality-dependent and-independent parts of optical conductivity transform under the reversal of tilt and chirality.Built on this theory,we propose ferromag-netic MnBi2Te4 as a magnetoelectrically regulated,terahertz optical device,by magnetoelectrically switching the chirality-dependent and-independent DC photocurrents.These results are useful for creating nonlinear optical devices based on the topological Weyl semimetals.
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