Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2008-07-17
International Journal of Modern Physics B (IJMPB), Year: 2009 Vol: 23 Issue: 16 (30 June 2009) Page: 3445 - 3457
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
14 pages, 4 figures, Published in International journal of Modern Physics B
Scientific paper
10.1142/S0217979209052613
We have investigated the electrical transport properties of Dirac electrons in a monolayer graphene sheet in the presence of both electric and magnetic modulations. The effects of the modulations on quantum transport when they are in phase and out of phase are considered. We present the energy spectrum and the bandwidth of the Dirac electrons in the presence of both the modulations. We determine the $\sigma_{yy}$ component of the magnetoconductivity tensor for this system which is shown to exhibit Weiss oscillations.Asymptotic expressions for $\sigma_{yy}$ are also calculated to better illustrate the effects of in-phase and out-of-phase modulations.We find that the position of the oscillations in magnetoconductivity depends on the relative strength of the two modulations. When the two modulations are out-of-phase there is complete suppression of Weiss oscillations for particular relative strength of the modulations.
Sabeeh Kashif
Tahir Muhammad
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