Graphene switch design: an illustration of the Klein paradox
  An armchair graphene ribbon switch has been designed based on the principle of the Klein paradox. The resulting switch displays an excellent on-off ratio performance. Anomalous tunneling phenomena are observed in our numerical simulations. According to our analytical results, selective tunneling rule is proposed to explain this interesting transport behavior. The switch design enriches the phenomenon of the Klein paradox and also provides a platform to study the paradox. 
Q. W. Shi, Z. F. Wang, Jie Chen, H. X. Zheng, Qunxiang Li, Xiaoping   Wang, Jinlong Yang, and J. G. Hou