Abstract
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.
基金项目
国家重点研发计划(2018YFA)
国家重点研发计划(0305601)
国家重点研发计划(2021YFA1400100)
国家自然科学基金(12274003)
国家自然科学基金(11725415)
国家自然科学基金(11934001)
Innovation Program for Quantum Science and Technology(2021ZD0302600)
万方数据