Open AccessPeculiar band gap structure of graphene nanoribbons
Author(s) -
Ezawa Motohiko
Publication year - 2007
Publication title -
physica status solidi c
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 46
eISSN - 1610-1642
pISSN - 1862-6351
DOI - 10.1002/pssc.200673205
Subject(s) - graphene nanoribbons , zigzag , nanoelectronics , condensed matter physics , band gap , enhanced data rates for gsm evolution , materials science , electronic band structure , graphene , nanotechnology , physics , geometry , mathematics , telecommunications , computer science
Graphene nanoribbons are quasi‐one‐dimensional meterials with finite width. Characterizing a wide class of nanoribbons by edge shape and width, we make a systematic analysis of their electronic properties. The band gap structure of nanoribbons is shown to exhibit a valley structure with stream‐like sequences of metallic or almost metallic nanoribbons. Among them, all zigzag nanoribbons are metallic, and armchair nanoribbons are metallic by period of 3. We find that these stream‐like sequences correspond to equi‐width curves, and that the band gap of chiral and armchair nanoribbons oscillate as a function of the width. Furthermore a possible application of nanoribbons to nanoelectronics is discussed. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)