论文标题
费米速度工程在磁石墨烯超晶格中的影响
Effects of Fermi velocity engineering in magnetic graphene superlattices
论文作者
论文摘要
在这项工作中，我们从理论上研究了费米速度调制对磁石墨烯超级晶格的电子和传输特性的影响。我们求解具有依赖位置的矢量电位和费米速度的石墨烯的有效狄拉克方程，并使用传输矩阵方法来获得有限情况的传输系数以及定期级别的分散关系。我们的结果表明，费米速度调制可以控制透射率的谐振峰，并且还可以作为开关，从而通过磁性屏障打开/关闭传输。此处获得的结果可用于制造基于石墨烯的电子设备。
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 here can be used for the fabrication of graphene-based electronic devices.
