title: Nearly perfect valley filter in silicene.
abstract: We demonstrate theoretically how a perfect valley filter can be obtained in silicene under the effects of a ferromagnetic stripe and an electric field perpendicular to silicene. A ferromagnetic stripe or an electric field alone can not generate any valley polarization in silicene, but a combination of them can make a perfect valley filter. Two configurations, one with magnetization of the ferromagnetic stripe being perpendicular to the silicene plane and one being parallel to the current direction, are considered. Our proposed device is useful for the realization of a valley beam filter in the development of valleytronic devices.
authors.affiliation: Department of Physics and Materials Science, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, People's Republic of China.
authors.forename: Qingtian
authors.initials: Q
authors.lastname: Zhang
authors.forename: K S
authors.initials: KS
authors.lastname: Chan
authors.forename: Mengqiu
authors.initials: M
authors.lastname: Long