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Absorption in Finite-Length Chevron-Type Graphene Nanoribbons
Absorption in Finite-Length Chevron-Type Graphene Nanoribbons
- Publication Year :
- 2018
- Publisher :
- American Institute of Physics, 2018.
-
Abstract
- Using a combination of the density functional theory and tight-binding calculations, we study electronic and optical properties of asymmetric chevron-type graphene nanoribbons recently synthesized with atomic precision. We demonstrate that the low-energy optical selection rules in such infinite chiral ribbons are more reminiscent of those for zigzag rather than for armchair ribbons. It is also shown that, starting from about 25 nm long ribbons, the low-energy absorption and therefore the selection rules of infinitely long ribbons are well reproduced in the finite cluster approach. Hence, ribbons longer than 25 nm (about 28 unit cells) can be treated as infinitely long ones.
- Subjects :
- Materials science
Condensed matter physics
02 engineering and technology
Type (model theory)
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
Atomic and Molecular Physics, and Optics
Electronic, Optical and Magnetic Materials
Settore FIS/03 - Fisica della Materia
Zigzag
0103 physical sciences
Cluster (physics)
Chevron (geology)
Density functional theory
010306 general physics
0210 nano-technology
Absorption (electromagnetic radiation)
Graphene nanoribbons
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....96f4eec515c67cddc58abf16c8ef1a82