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

Abstract

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.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1051314
Report Number(s):
IS-J 7748
DOE Contract Number:  
DE-AC02-07CH11358
Resource Type:
Journal Article
Journal Name:
Journal of Physics Condensed Matter
Additional Journal Information:
Journal Volume: 24; Journal Issue: June 2012
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Zhang, GP, Gao, M., Zhang, Y.Y., Liu, N., Qin, Z.J., and Shanqqan, M.H. Effect of disorder with long-range correlation on transport in graphene nanoribbon. United States: N. p., 2012. Web. doi:10.1088/0953-8984/24/23/235303.
Zhang, GP, Gao, M., Zhang, Y.Y., Liu, N., Qin, Z.J., & Shanqqan, M.H. Effect of disorder with long-range correlation on transport in graphene nanoribbon. United States. doi:10.1088/0953-8984/24/23/235303.
Zhang, GP, Gao, M., Zhang, Y.Y., Liu, N., Qin, Z.J., and Shanqqan, M.H. Wed . "Effect of disorder with long-range correlation on transport in graphene nanoribbon". United States. doi:10.1088/0953-8984/24/23/235303.
@article{osti_1051314,
title = {Effect of disorder with long-range correlation on transport in graphene nanoribbon},
author = {Zhang, GP and Gao, M. and Zhang, Y.Y. and Liu, N. and Qin, Z.J. and Shanqqan, M.H.},
abstractNote = {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.},
doi = {10.1088/0953-8984/24/23/235303},
journal = {Journal of Physics Condensed Matter},
number = June 2012,
volume = 24,
place = {United States},
year = {2012},
month = {6}
}