Abstract
We study the effect of trigonal warping on the Klein tunneling and scattering of electrons in bipolar junctions of bilayer graphene. We derive average velocities of electrons and obtain closed forms of transmission and reflection amplitudes. For normal incidence the amplitude and the average velocity in transmission zone are obtained to be zero, from which we show that the Klein effect of perfect reflection can appear in a thin potential barrier as well as in a potential step. The trigonal warping also causes variation in curvatures of isoenergy curves and breaks the valley degeneracy. This brings about valley-polarized scattering of electrons in the bipolar junctions, which can be used to produce a valley-polarized electron beam with bilayer graphene.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
