Journal article
Collective modes of massive Dirac fermions in armchair graphene nanoribbons
Journal of physics. Condensed matter, Vol.25(4), pp.045303-045303
12/20/2012
DOI: 10.1088/0953-8984/25/4/045303
PMID: 23257918
Abstract
We report the plasmon dispersion characteristics of intrinsic and extrinsic armchair graphene nanoribbons of atomic width N = 5 using a pz-orbital tight binding model with third-nearest-neighbor (3nn) coupling. The hopping parameters are obtained by fitting the 3nn dispersions to those of an extended Hückel theory. The resultant massive Dirac fermion system has a band gap Eg 64 meV. The extrinsic plasmon dispersion relation is found to asymptotically approach a universal dispersion curve as the chemical potential μ increases, whereas the intrinsic plasmon dispersion relation is found to have both energy and momentum thresholds. We also report an analytical model for the extrinsic plasmon group velocity in the q → 0 limit.
Details
- Title: Subtitle
- Collective modes of massive Dirac fermions in armchair graphene nanoribbons
- Creators
- David R Andersen - University of IowaHassan Raza - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Journal of physics. Condensed matter, Vol.25(4), pp.045303-045303
- DOI
- 10.1088/0953-8984/25/4/045303
- PMID
- 23257918
- NLM abbreviation
- J Phys Condens Matter
- ISSN
- 0953-8984
- eISSN
- 1361-648X
- Publisher
- IOP Publishing
- Number of pages
- 5
- Language
- English
- Date published
- 12/20/2012
- Academic Unit
- Electrical and Computer Engineering; Physics and Astronomy
- Record Identifier
- 9984197290702771
Metrics
8 Record Views