Volume 112, Number 5, December 2015
|Number of page(s)||6|
|Section||Interdisciplinary Physics and Related Areas of Science and Technology|
|Published online||18 December 2015|
Electronic band gaps and transport properties in periodically alternating mono- and bi-layer graphene superlattices
1 Department of Physics, Beijing Normal University - Beijing 100875, China
2 Beijing Computational Science Research Center - Beijing 100094, China
3 Department of Physics, Zhejiang University - Hangzhou 310027, China
Received: 25 June 2015
Accepted: 26 November 2015
We investigate the electronic band structure and transport properties of periodically alternating mono- and bi-layer graphene superlattices (MBLG SLs). In such MBLG SLs, there exists a zero-averaged wave vector (zero-) gap that is insensitive to the lattice constant. This zero- gap can be controlled by changing both the ratio of the potential widths and the interlayer coupling coefficient of the bilayer graphene. We also show that there exist extra Dirac points; the conditions for these extra Dirac points are presented analytically. Lastly, we demonstrate that the electronic transport properties and the energy gap of the first two bands in MBLG SLs are tunable through adjustment of the interlayer coupling and the width ratio of the periodic mono- and bi-layer graphene.
PACS: 81.05.ue – Graphene / 72.80.Vp – Electronic transport in graphene
© EPLA, 2015
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