科研之友
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摘要
We study resonant tunneling through a magnetic barrier structure in graphene, on the basis of Fabry-Perot interference effect. For parallel structure, the Fabry-Perot resonance displays symmetric distribution in (E, k(y)) space, and the transmission range is shrunk rapidly with the increased magnetic barrier or period number. For antiparallel structure, there exists a complex resonant tunneling caused by the combined effect of Fabry-Perot resonance and line-type resonance, which are related to resonant states in the vector potential barriers and wells, respectively. Such a transmission difference leads to a giant magnetoresistance ratio which can be effectively controlled by adjusting the magnetic field.
- 出版日期2014-7-7
