Current Applied Physics 14(2014)1455-1459 Contents lists available at ScienceDirect Current Applied Physics Current Applied Physics ELSEVIER journal homepage:.elsevier./locate/cap Gate-tunable valley-filter based on suspended graphene with double CrossMark magnetic barrier structures Nojoon Myoung a b.1 Gukhyung Ihm b." a Institute of Quantum Systems Chungnam National University Daejeon 305-764 Republic of Korea bDepartment of Physics.Chungnam National University.Daejeon 305-764 Republic of Korea ARTICLEINFO ABSTRACT Article history: We theoretically investigate the effects of strain-induced pseudomagnetic fields on the transmission Received 16 June 2014 probability and the ballistic conductance for Dirac fermion transport in suspended graphene.We show Received in revised form that resonant tunneling through double magnetic barriers can be tuned by strain in the suspended re- 18July2014 Accepted 12 August 2014 gion.The valley-resolved transmission peaks are apparently distinguishable owing to the sharpness of Available online 1 September 2014 the resonant tunneling.With the specific strain the resonant tunneling is pletely suppressed for Dirac fermions occupying the one valley but the resonant tunneling exists for the other valley.The Keywords: valley-filtering effect is expected to be measurable by strain engineering.The proposed system can be Graphene used to fabricate a graphene valley filter with the large valley polarization almost 100%. Valley filter o 2014 Els...
索结构外文文献 基于双磁障结构悬浮石墨烯的门控可调谷滤波器.pdf
