Electronic band gaps and transport properties in aperiodic bilayer graphene superlattices of Thue-Morse sequence

We investigate electronic band structure and transport properties in bilayer graphene superlattices of Thue-Morse sequence. It is interesting to find that the zero-k¯ gap center is sensitive to interlayer coupling t′, and the centers of all gaps shift versus t′ at a linear way. Extra Dirac points ma...

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Bibliographic Details
Published in:Applied physics letters 2013-10, Vol.103 (17)
Main Authors: Li, Changan, Cheng, Hemeng, Chen, Ruofan, Ma, Tianxing, Wang, Li-Gang, Song, Yun, Lin, Hai-Qing
Format: Article
Language:English
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Summary:We investigate electronic band structure and transport properties in bilayer graphene superlattices of Thue-Morse sequence. It is interesting to find that the zero-k¯ gap center is sensitive to interlayer coupling t′, and the centers of all gaps shift versus t′ at a linear way. Extra Dirac points may emerge at ky≠0, and when the extra Dirac points are generated in pairs, the electronic conductance obeys a diffusive law, and the Fano factor tends to be 1/3 as the order of Thue-Morse sequence increases. Our results provide a flexible and effective way to control the transport properties in graphene.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4826643