Anomalous Dirac point transport due to extended defects in bilayer graphene

Shallcross S, Sharma S, Weber HB (2017)


Publication Language: English

Publication Type: Journal article, Letter

Publication year: 2017

Journal

Book Volume: 8

Pages Range: 342

Journal Issue: 1

URI: https://www.nature.com/articles/s41467-017-00397-8

DOI: 10.1038/s41467-017-00397-8

Open Access Link: https://www.nature.com/articles/s41467-017-00397-8

Abstract

Charge transport at the Dirac point in bilayer graphene exhibits two dramatically different transport states, insulating and metallic, that occur in apparently otherwise indistinguishable experimental samples. We demonstrate that the existence of these two transport states has its origin in an interplay between evanescent modes, that dominate charge transport near the Dirac point, and disordered configurations of extended defects in the form of partial dislocations. In a large ensemble of bilayer systems with randomly positioned partial dislocations, the distribution of conductivities is found to be strongly peaked at both the insulating and metallic limits. We argue that this distribution form, that occurs only at the Dirac point, lies at the heart of the observation of both metallic and insulating states in bilayer graphene.

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APA:

Shallcross, S., Sharma, S., & Weber, H.B. (2017). Anomalous Dirac point transport due to extended defects in bilayer graphene. Nature Communications, 8(1), 342. https://dx.doi.org/10.1038/s41467-017-00397-8

MLA:

Shallcross, Sam, Sangeeta Sharma, and Heiko B. Weber. "Anomalous Dirac point transport due to extended defects in bilayer graphene." Nature Communications 8.1 (2017): 342.

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