標題: Two distinct ballistic processes in graphene
作者: Lewkowicz, M.
Rosenstein, B.
Nghiem, D.
電子物理學系
Department of Electrophysics
公開日期: 1-Jan-2012
摘要: A dynamical approach to ballistic transport in mesoscopic graphene samples of finite length Land contact potential difference with leads U is developed. It is shown that at ballistic times shorter than both relevant time scales, t(L) = L/v(g) (v(g) - Fermi velocity) and t(U) = (h) over bar/(eU), the major effect of electric field is to creates the electron - hole pairs, namely causes interband transitions. At ballistic times lager than the two scales the mechanism is very different. The conductivity has its "nonrelativistic" or intraband value equal to the one obtained within the Landauer-Butticker approach for the barrier U-resulting from evanescent waves tunneling through the barrier.
URI: http://dx.doi.org/10.1088/1742-6596/400/4/042038
http://hdl.handle.net/11536/135467
ISSN: 1742-6588
DOI: 10.1088/1742-6596/400/4/042038
期刊: 26TH INTERNATIONAL CONFERENCE ON LOW TEMPERATURE PHYSICS (LT26), PTS 1-5
Volume: 400
起始頁: 0
結束頁: 0
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