Energy shift and conduction-to-valence band transition mediated by a time dependent potential barrier in graphene
arXiv:1601.00536 · doi:10.1103/PhysRevB.92.125441
Abstract
We investigate the scattering of a wave packet describing low-energy electrons in graphene by a time-dependent finite step potential barrier. Our results demonstrate that, after Klein tunneling through the barrier, the electron acquires an extra energy which depends on the rate of change the barrier height in time. If such a rate is negative, the electron loses energy and ends up as a valence band state after leaving the barrier, which effectively behaves as a positively charged quasi-particle
5 pages, 5 figures, Fig. 3 selected for the Kaleidoscope section (Sept. 2015) of Phys. Rev. B
References in corpus (7)
- Electric Field Effect in Atomically Thin Carbon Films
- The electronic properties of graphene
- Chiral tunneling and the Klein paradox in graphene
- Quantum interference and Klein tunneling in graphene heterojunctions
- Wave packet dynamics and valley filter in strained graphene
- Modeling Klein tunneling and caustics of electron waves in graphene
- The split-operator technique for the study of spinorial wavepacket dynamics