波矢
量子隧道
凝聚态物理
石墨烯
物理
超晶格
自旋(空气动力学)
联轴节(管道)
材料科学
量子力学
热力学
冶金
作者
Wei-Tao Lu,Wen Li,Yong-Long Wang,Hua Jiang,Chunju Xu
摘要
The resonant tunneling in graphene superlattices with an exchange field is studied theoretically. The results show that a resonant tunneling occurs in the transmission gap by virtue of the transverse wave vector. The position, width, and number of resonant tunneling can be effectively manipulated by adjusting the barrier strength, barrier width, and well width, respectively, which indicates the remarkable wavevector filtering behavior. This resonant effect together with the exchange splitting can be utilized to design an efficient spin filter. It is also found that the energy spectrum in the bound region displays bandlike distribution due to the coupling of eigenstates.
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