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首页> 外文期刊>Physica, B. Condensed Matter >Tunable electronic transmission gaps in a graphene superlattice
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Tunable electronic transmission gaps in a graphene superlattice

机译:石墨烯超晶格中的可调电子传输间隙

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摘要

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.
机译:利用转移矩阵方法研究了势垒高度可调的石墨烯超晶格中的透射率。发现可以通过改变入射能量与势垒高度之比来控制透射角范围。由于of逝波出现在不同的势垒中,因此作为入射能量的函数的传输具有多个间隙。因此,引起了一个以上的导电率最小值。可以通过调节入射角,势垒高度和势垒数来控制传输间隙,从而有可能构造依赖于能量的波矢滤波器。

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