Journal
EPL
Volume 107, Issue 3, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1209/0295-5075/107/37004
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Funding
- National Natural Science Foundation of China [NSFC51032002, NSFC11247033, NSFC11374162, NSFC11347129]
- key project of National High Technology Research and Development Program (863 Program) of China [2011AA050526]
- Science and Technology Support Plan of Jiangsu Province [BE2011191]
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Based on the tight-binding method and density functional theory, band structures and transport properties of T-graphene nanoribbons are investigated. By constructing and solving the tight-binding Hamiltonian, we derived the analytic expressions of the linear dispersion relation and Fermi velocity of Dirac-like fermions for armchair T-graphene nanoribbons. Multiple Dirac points, which are triggered by the mirror symmetry of armchair T-graphene nanoribbons, are observed. The number and positions of multiple Dirac points can be well explained by our analytic expressions. Tight-binding results are confirmed by the results from density functional calculations. Moreover, armchair T-graphene nanoribbons exhibit negative differential resistance, whereas zigzag T-graphene nanoribbons have linear current-bias voltage characteristics near the Fermi level. Copyright (C) EPLA, 2014
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