Effect of disorder with long-range correlation on transport in graphene nanoribbon

Journal Article · Wed Jun 13 04:00:00 EDT 2012 · Journal of Physics Condensed Matter

DOI:https://doi.org/10.1088/0953-8984/24/23/235303· OSTI ID:1051314

Zhang, GP; Gao, M; Zhang, Y Y; Liu, N; Qin, Z J; Shanqqan, M H

Transport in disordered armchair graphene nanoribbons (AGR) with long-range correlation between quantum wire contacts is investigated by a transfer matrix combined with Landauer's formula. The metal-insulator transition is induced by disorder in neutral AGR. Therein, the conductance is one conductance quantum for the metallic phase and exponentially decays otherwise, when the length of AGR approaches infinity and far longer than its width. Similar to the case of long-range disorder, the conductance of neutral AGR first increases and then decreases while the conductance of doped AGR monotonically decreases, as the disorder strength increases. In the presence of strong disorder, the conductivity depends monotonically and non-monotonically on the aspect ratio for heavily doped and slightly doped AGR, respectively. For edge disordered graphene nanoribbon, the conductance increases with the disorder strength of long-range correlated disordered while no delocalization exists, since the edge disorder induces localization.

• Research Organization: Ames Laboratory (AMES), Ames, IA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC02-07CH11358
• OSTI ID: 1051314
• Report Number(s): IS-J 7748
• Journal Information: Journal of Physics Condensed Matter, Journal Name: Journal of Physics Condensed Matter Journal Issue: June 2012 Vol. 24
• Country of Publication: United States
• Language: English

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36 MATERIALS SCIENCE