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5 papers · 2 filters
Robustness of the helical edge states in topological insulators
Xue-Feng Wang, Yibin Hu, Hong Guo
Topological insulators (TI) are materials having an energy band gap in the bulk and conducting helical electronic states on the surface. The helical states are protected by time re…
Dynamic screening and plasmon spectrum in bilayer graphene
Wen-Long You, Xue-Feng Wang
We have theoretically studied the collective response properties of the two-dimensional chiral electron gas in bilayer graphene within the random phase approximation. The cooperati…
Disorder induced field effect transistor in bilayer and trilayer graphene
Dongwei Xu, Haiwen Liu, Vincent Sacksteder +4
We propose use of disorder to produce a field effect transistor (FET) in biased bilayer and trilayer graphene. Modulation of the bias voltage can produce large variations in the co…
Floquet spin states in graphene under ac driven spin-orbit interaction
A. López, Z. Z. Sun, J. Schliemann
We study the role of periodically driven time-dependent Rashba spin-orbit coupling (RSOC) on a monolayer graphene sample. After recasting the originally system of dynam…
Negative differential spin conductance in doped zigzag graphene nanoribbons
Ting-Ting Wu, Xue-Feng Wang, Ming-Xing Zhai +3
The spin dependent charge transport in zigzag graphene nanoribbons (ZGNRs) has been investigated by the nonequilibrium Green's function method combined with the density functional…