Issue |
EPL
Volume 107, Number 3, August 2014
|
|
---|---|---|
Article Number | 37004 | |
Number of page(s) | 6 | |
Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
DOI | https://doi.org/10.1209/0295-5075/107/37004 | |
Published online | 01 August 2014 |
Electronic and transport properties of T-graphene nanoribbon: Symmetry-dependent multiple Dirac points, negative differential resistance and linear current-bias characteristics
1 College of Science, Nanjing University of Aeronautics and Astronautics - Nanjing 210016, PRC
2 College of Electronic Science and Engineering, Nanjing University of Posts and Telecommunications Nanjing, 210046, PRC
Received: 2 April 2014
Accepted: 11 July 2014
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.
PACS: 73.22.-f – Electronic structure of nanoscale materials and related systems / 73.63.-b – Electronic transport in nanoscale materials and structures / 61.46.-w – Structure of nanoscale materials
© EPLA, 2014
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.