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Tuning Inelastic Light Scattering via Symmetry Control in 2D Magnet CrI
Bevin Huang, John Cenker, Xiaoou Zhang +7
The coupling between spin and charge degrees of freedom in a crystal imparts strong optical signatures on scattered electromagnetic waves. This has led to magneto-optical effects w…
Tunable Layer Circular Photogalvanic Effect in Twisted Bilayers
Yang Gao, Yinhan Zhang, Di Xiao
We develop a general theory of the layer circular photogalvanic effect (LCPGE) in quasi two-dimensional chiral bilayers, which refers to the appearance of a polarization-dependent,…
Optical detection and manipulation of spontaneous gyrotropic electronic order in a transition-metal dichalcogenide semimetal
Su-Yang Xu, Qiong Ma, Yang Gao +16
The observation of chirality is ubiquitous in nature. Contrary to intuition, the population of opposite chiralities is surprisingly asymmetric at fundamental levels. Examples range…
Topological charge pumping in twisted bilayer graphene
Yinhan Zhang, Yang Gao, Di Xiao
We show that a sliding motion between the two layers of a \moire superlattice induces an electric current and realizes a two-dimensional version of the topological Thouless pump wh…
Scaling Behavior of the Quantum Phase Transition from a Quantum Anomalous Hall Insulator to an Axion Insulator
Xinyu Wu, Di Xiao, Chui-Zhen Chen +7
The phase transitions from one plateau to the next plateau or to an insulator in quantum Hall and quantum anomalous Hall (QAH) systems have revealed universal scaling behaviors. A…
Switching 2D Magnetic States via Pressure Tuning of Layer Stacking
Tiancheng Song, Zaiyao Fei, Matthew Yankowitz +15
The physical properties of two-dimensional van der Waals (2D vdW) crystals depend sensitively on the interlayer coupling, which is intimately connected to the stacking arrangement…