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Edge‐disorder effects on electric transport in metallic graphene nanoribbons at finite temperature
Author(s) -
Takashima Kengo,
Konabe Satoru,
Yamamoto Takahiro
Publication year - 2016
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.6101
Subject(s) - condensed matter physics , graphene nanoribbons , graphene , enhanced data rates for gsm evolution , symmetry (geometry) , charge (physics) , density of states , fermi energy , physics , fermi level , metal , charge density , materials science , quantum mechanics , mathematics , electron , geometry , telecommunications , computer science , metallurgy
We theoretically study electric transport in edge‐disordered armchair graphene nanoribbons (ED‐AGNRs) using an extended Hückel model combined with the non‐equilibrium Green's function formulation. We find that ED‐AGNRs exhibit the Anderson localization even at the Fermi energy (i.e., charge neutral point) originating from broken chiral symmetry of the system. Moreover, the localization length increases with temperature at low‐density edge disorder, whereas it is almost independent of temperature at high‐density one. Copyright © 2016 John Wiley & Sons, Ltd.