24 citations · 85 across the 15 of their papers we have counts for
11 papers · 1 filter
Linear exciton Hall and Nernst effects in monolayer two-dimensional semiconductors
Weilong Guo, Lianguo Li, Qingjun Tong +1
This paper focuses on the study of linear exciton Hall and Nernst effects in monolayer two-dimensional (2D) semiconductors, employing the semi-classical transport theory. By derivi…
Topological classification and edge states of magnons in honeycomb ferromagnets
Youwen wang, Qiutong Wang, Qingjun Tong +1
We study the topological classification and related edge states of magnons in ferromagnets on honeycomb that can be described by a class of single-particle bosonic Bogoliubov-de Ge…
Förster valley-orbit coupling and topological lattice of hybrid moiré excitons
Huiyuan Zheng, Ci Li, Hongyi Yu +1
Hybrid exciton in moiré superlattices of two-dimensional (2D) semiconductors inherits the electric dipole, strong moiré trapping, and stacking optical selection rules from its inte…
Chiral excitonic systems in twisted bilayers from Förster coupling and unconventional excitonic Hall effects
Ci Li, Wang Yao
In twisted bilayer semiconductors with arbitrary twisting angles, a chiral excitonic system can arise from the interlayer electron-hole Coulomb exchange interaction (Förster coupli…
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…
Cross-dimensional valley excitons from Förster coupling in arbitrarily twisted stacks of monolayer semiconductors
Ci Li, Wang Yao
In stacks of transition metal dichalcogenide monolayers with arbitrary twisting angles, we explore a new class of bright excitons arising from the pronounced Förster coupling, whos…
Anomalous Bloch oscillation and electrical switching of edge magnetization in bilayer graphene nanoribbon
Tixuan Tan, Fengren Fan, Ci Li +1
Graphene features topological edge bands that connect the pair of Dirac points through either sectors of the 1D Brillouin zone depending on edge configurations (zigzag or bearded).…
Edge state in AB-stacked bilayer graphene and its correspondence with SSH ladder
Tixuan Tan, Ci Li, Wang Yao
We study edge states in AB-stacked bilayer graphene (BLG) ribbon where the Chern number of the corresponding two-dimensional (2D) bulk Hamiltonian is zero. The existence and topolo…
Revealing the non-adiabatic and non-Abelian multiple-band effects via anisotropic valley Hall conduction in bilayer graphene
Ci Li, Matisse Wei-Yuan Tu, Wang Yao
Many quantum materials of interest, ex., bilayer graphene, possess a number of closely spaced but not fully degenerate bands near the Fermi level, where the coupling to the far det…
Theory of wavepacket transport under narrow gaps and spatial textures: non-adiabaticity and semiclassicality
Matisse Wei-Yuan Tu, Ci Li, Wang Yao
We generalise the celebrated semiclassical wavepacket approach from the adiabatic to the non-adiabatic regime. A unified description covering both of these regimes is particularly…
Non-adiabatic Hall effect at Berry curvature hot spot
Matisse Wei-Yuan Tu, Ci Li, Hongyi Yu +1
Hot spot of Berry curvature is usually found at Bloch band anti-crossings, where the Hall effect due to the Berry phase can be most pronounced. With small gaps there, the adiabatic…