Tunable electronic transmission gaps in a graphene superlattice |
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Authors: | Wei-Tao Lu Shun-Jin WangWen Li Yong-Long WangHua Jiang |
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Affiliation: | a Department of Physics, Linyi University, 276005 Linyi, China b Department of Physics, Sichuan University, 610064 Chengdu, China |
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Abstract: | The transmission in graphene superlattices with adjustable barrier height is investigated using transfer-matrix method. It is found that one could control the angular range of transmission by changing the ratio of incidence energy and barrier height. The transmission as a function of incidence energy has more than one gaps, due to the appearance of evanescent waves in different barriers. Accordingly, more than one conductivity minimums are induced. The transmission gaps could be controlled by adjusting the incidence angle, the barrier height, and the barrier number, which gives the possibility to construct an energy-dependent wavevector filter. |
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Keywords: | Transmission gaps Graphene superlattices Energy filtering |
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