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Giant nonlinear photocurrent in -symmetric magnetic topological quantum materials
Hua Wang, Xiaofeng Qian
Nonlinear photocurrent in time-reversal invariant noncentrosymmetric systems have attracted substantial interest. Here we propose two new types of second-order nonlinear direct pho…
Berry curvature memory through electrically driven stacking transitions
Jun Xiao, Ying Wang, Hua Wang +9
In two-dimensional layered quantum materials, the stacking order of the layers determines both the crystalline symmetry and electronic properties such as the Berry curvature, topol…
Electrically-Tunable High Curie Temperature Two-Dimensional Ferromagnetism in Van der Waals Layered Crystals
Hua Wang, Jingshan Qi, Xiaofeng Qian
Identifying intrinsic low-dimensional ferromagnets with high transition temperature and electrically tunable magnetism is crucial for the development of miniaturized spintronics an…
Two-Dimensional Multiferroic Semiconductors with Coexisting Ferroelectricity and Ferromagnetism
Jingshan Qi, Hua Wang, Xiaofang Chen +1
Low-dimensional multiferroicity, though highly scarce in nature, has attracted great attention due to both fundamental and technological interests. Using first-principles density f…
Crystal Field Effect Induced Topological Crystalline Insulators In Monolayer IV-VI Semiconductors
Junwei Liu, Xiaofeng Qian, Liang Fu
Two-dimensional (2D) topological crystalline insulators (TCIs) were recently predicted in thin films of the SnTe class of IV-VI semiconductors, which can host metallic edge states…