275 citations · 1.3k across the 17 of their papers we have counts for
17 papers
Non-Hermitian theory of valley excitons in two-dimensional semiconductors
Qiutong Wang, Ci Li, Qingjun Tong
Electron-hole exchange interaction in two-dimensional transition metal dichalcogenides is extremely strong due to the dimension reduction, which promises valley-superposed excitoni…
Correlation-induced symmetry-broken states in large-angle twisted bilayer graphene on MoS2
Kaihui Li, Long-Jing Yin, Chenglong Che +6
Strongly correlated states are commonly emerged in twisted bilayer graphene (TBG) with magic-angle, where the electron-electron (e-e) interaction U becomes prominent relative to th…
Tunable Strong Magnetic Anisotropy in Two-Dimensional van der Waals Antiferromagnets
Feiping Xiao, Qingjun Tong
We show that anisotropic energy of a 2D antiferromagnet is greatly enhanced via stacking on a magnetic substrate layer, arising from the sublattice-dependent interlayer magnetic in…
Magnon corner states in twisted bilayer honeycomb magnets
Chun-Bo Hua, Feiping Xiao, Zheng-Rong Liu +6
Search for higher-order topological insulators, characterized by topologically protected gapless boundary states of codimension higher than one, in bosonic systems has attracted gr…
Acoustic helical dichroism in a one-dimensional lattice of chiral resonators
Qing Tong, Shubo Wang
Circular dichroism and helical dichroism are intriguing chiroptical phenomena with broad applications in optical sensing and imaging. Here, we generalize one of the phenomena-helic…
Spin-orbit interactions of transverse sound
Shubo Wang, Guanqing Zhang, Xulong Wang +3
Spin-orbit interactions (SOIs) endow light with intriguing properties and applications such as photonic spin-Hall effects and spin-dependent vortex generations. However, it is coun…
Magnetization textures in twisted bilayer 2D CrX (X=Br, I)
Feiping Xiao, Keqiu Chen, Qingjun Tong
Motivated by the recent experiment demonstration of stacking dependent interlayer magnetic interaction [T. Song et al., Nat. Mater. 18, 1298 (2019); T. Li et al., Nat. Mater. 18, 1…
Chiral channel network from magnetization textures in 2D MnBi2Te4
Chengxin Xiao, Jianju Tang, Pei Zhao +2
When atomically thin van der Waals (vdW) magnet forms long-period moiré pattern with a magnetic substrate, the sensitive dependence of interlayer magnetic coupling on the atomic re…
Interferences of electrostatic moiré potentials and bichromatic superlattices of electrons and excitons in transition metal dichalcogenides
Qingjun Tong, Mingxing Chen, Feiping Xiao +2
Recent experimental progresses have demonstrated the great potential of electronic and excitonic moiré superlattices in transition metal dichalcogenides (TMDs) for quantum many-bod…
Magnetic Proximity Effect in a van der Waals Moiré Superlattice
Qingjun Tong, Mingxing Chen, Wang Yao
We investigate the magnetic proximity effect in van der Waals heterostructure formed by a monolayer semiconductor stacked on a 2D ferromagnet, where the lattice mismatch and twisti…
Coulomb effects on topological band inversion in the moiré of WSe/BAs heterobilayer
Qizhong Zhu, Qingjun Tong, Huazheng Sun +2
Quantum spin Hall (QSH) insulator with large gap is highly desirable for potential spintronics application. Here we realize electrically tunable QSH insulator with large gap in van…
Gate tuning from exciton superfluid to quantum anomalous Hall in van der Waals heterobilayer
Qizhong Zhu, Matisse Wei-Yuan Tu, Qingjun Tong +1
Van der Waals heterostructures of 2D materials provide a powerful approach towards engineering various quantum phases of matters. Examples include topological matters such as quant…
Skyrmions in the moiré of van der Waals 2D magnets
Qingjun Tong, Fei Liu, Jiang Xiao +1
We explore the skyrmion formation and control possibilities in 2D magnets from the ubiquitous moiré pattern in vdW heterostructures. Using the example of a ferromagnetic monolayer…
Stacking-symmetry governed second harmonic generation in graphene trilayers
Yuwei Shan, Yingguo Li, Di Huang +4
Crystal symmetry plays a central role in governing a wide range of fundamental physical phenomena. One example is the nonlinear optical second harmonic generation (SHG), which requ…
Topological mosaic in Moiré superlattices of van der Waals heterobilayers
Qingjun Tong, Hongyi Yu, Qizhong Zhu +3
Van der Waals (vdW) heterostructures formed by 2D atomic crystals provide a powerful approach towards designer condensed matter systems. Incommensurate heterobilayers with small tw…
Spin-valley qubit in nanostructures of monolayer semiconductors: Optical control and hyperfine interaction
Yue Wu, Qingjun Tong, Gui-Bin Liu +2
We investigate the optical control possibilities of spin-valley qubit carried by single electrons localized in nanostructures of monolayer TMDs, including small quantum dots formed…
Anomalous light cones and valley optical selection rules of interlayer excitons in twisted heterobilayers
Hongyi Yu, Yong Wang, Qingjun Tong +2
We show that, because of the inevitable twist and lattice mismatch in heterobilayers of transition metal dichalcogenides, interlayer excitons have six-fold degenerate light cones a…