title: Topological spin and valley pumping in silicene.
abstract: We propose to realize adiabatic topological spin and valley pumping by using silicene, subject to the modulation of an in-plane ac electric field with amplitude Ey and a vertical electric field consisting of an electrostatic component and an ac component with amplitudes and . By tuning and , topological valley pumping or spin-valley pumping can be achieved. The low-noise valley and spin currents generated can be useful in valleytronic and spintronic applications. Our work also demonstrates that bulk topological spin or valley pumping is a general characteristic effect of two-dimensional topological insulators, irrelevant to the edge state physics.
authors: National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China.
authors: Wei
authors: W
authors: Luo
authors: National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China.|Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China.
authors: L
authors: L
authors: Sheng
authors: National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China.|Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China.
authors: B G
authors: BG
authors: Wang
authors: National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China.|Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China.
authors: D Y
authors: DY
authors: Xing