DPG Phi
Verhandlungen
Verhandlungen
DPG

Regensburg 2013 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

HL: Fachverband Halbleiterphysik

HL 35: Graphene: Transport (TT, jointly with HL, MA, O)

HL 35.10: Vortrag

Dienstag, 12. März 2013, 12:00–12:15, H17

Current resonances in graphene with time dependent potential barriersSergey E. Savel’ev1, •Wolfgang Häusler2, and Peter Hänggi21Department of Physics, Loughborough University, United Kingdom — 2Universität Augsburg, Germany

A method is derived to solve the massless Dirac-Weyl equation describing electron transport in a mono-layer of graphene with a scalar potential barrier U(x,t), homogeneous in the y-direction, of arbitrary x- and time dependence. Resonant enhancement of both electron backscattering and currents, across and along the barrier, is predicted when the modulation frequencies satisfy certain resonance conditions. These conditions resemble those for Shapiro-steps of driven Josephson junctions. Surprisingly, we find a non-zero y-component of the current for carriers of zero momentum along the y-axis.
[1] Sergey E. Savel’ev, Wolfgang Häusler, Peter Hänggi, Phys. Rev. Lett. 109, 226602 (2012).

100% | Mobil-Ansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2013 > Regensburg