TY - JOUR
T1 - Two distinct ballistic processes in graphene
AU - Lewkowicz, M.
AU - Rosenstein, B.
AU - Nghiem, D.
PY - 2012
Y1 - 2012
N2 - 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/vg (vg - Fermi velocity) and t u = H/(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 Uresulting from evanescent waves tunneling through the barrier.
AB - 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/vg (vg - Fermi velocity) and t u = H/(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 Uresulting from evanescent waves tunneling through the barrier.
UR - http://www.scopus.com/inward/record.url?scp=84873689356&partnerID=8YFLogxK
U2 - 10.1088/1742-6596/400/4/042038
DO - 10.1088/1742-6596/400/4/042038
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AN - SCOPUS:84873689356
SN - 1742-6588
VL - 400
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - PART 4
M1 - 042038
T2 - 26th International Conference on Low Temperature Physics, LT 2011
Y2 - 10 August 2011 through 17 August 2011
ER -