In this work we investigate theoretically the influence of a Fermi velocity modulation in the electronic and transport properties of magnetic graphene superlattices. We solve the effective Dirac equation for graphene with a position dependent vector potential and Fermi velocity and use the transfer matrix method to obtain the transmission coefficient for the finite cases and the dispersion relation for a periodic superlattice. Our results reveals that the Fermi velocity modulation can control the resonance peaks of the transmittance and also works as a switch, turning on/off the transmission through the magnetic barriers. The results obtained her e can be used for the fabrication of graphene-based electronic devices.

在这项工作中，我们从理论上研究了费米速度调制对磁性石墨烯超晶格的电子和传输性质的影响。我们用与位置有关的矢量电势和费米速度求解石墨烯的有效Dirac方程，并使用传递矩阵法获得有限情况下的透射系数和周期超晶格的色散关系。我们的结果表明，费米速度调制可以控制透射率的共振峰，并且还可以作为开关来打开/关闭通过磁障的透射。其获得的结果可用于制造基于石墨烯的电子设备。