Relativistic electron transport through an oscillating barrier: wave packet generation and Fano-type resonances
arXiv:1503.00929 · doi:10.1103/PhysRevB.88.075438
Abstract
Transport properties of massive Dirac particles are investigated through an oscillating barrier. The Floquet quasienergies related to the time-dependent potential appear both in transmission and reflection as sidebands around the incoming electron's energy. We take all relevant sidebands into account and present time averaged transmission and reflection probabilities in a wide energy range. Most qualitative features of scattering on a static barrier -- like Klein paradox -- are still visible, but the transmission probability in the evanescent regime observably increases due to the oscillation of the potential. The strongly inelastic scattering process is shown to lead to multiple Fano-type resonances and temporal trapping of the particles inside the oscillating potential. We also present a detailed study of the time evolution of the wave packets generated in the scattering process. Our results can be relevant for graphene with an induced energy gap.
References in corpus (11)
- Electric Field Effect in Atomically Thin Carbon Films
- Chiral tunneling and the Klein paradox in graphene
- Substrate-induced band gap opening in epitaxial graphene
- Quantum interference and Klein tunneling in graphene heterojunctions
- Driven quantum transport on the nanoscale
- Transport measurements across a tunable potential barrier in graphene
- Unified description of the Zitterbewegung for spintronic, graphene and superconducting systems
- Zitterbewegung (trembling motion) of electrons in semiconductors: a Review
- Barrier Paradox in the Klein Zone
- Snake states and Klein tunneling in a graphene Hall bar with a pn-junction
- Quantum pumping and rectification effects in Aharonov-Bohm-Casher ring-dot systems