Disorder induced Coulomb gaps in graphene constrictions with different aspect ratios

Details Disorder induced Coulomb gaps in graphene constrictions with different aspect ratios Disorder induced Coulomb gaps in graphene constrictions with different aspect ratios

2010-11-09

arxiv.org/abs/1011.2091v2

Appl. Phys. Lett. 98 032109 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures

Scientific paper

10.1063/1.3544580

We present electron transport measurements on lithographically defined and etched graphene nanoconstrictions with different aspect ratios including different lengths (L) and widths (W). A roughly length-independent disorder induced effective energy gap can be observed around the charge neutrality point. This energy gap scales inversely with the width even in regimes where the length of the constriction is smaller than its width (L

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