Absorption in Finite-Length Chevron-Type Graphene Nanoribbons
- Authors: Saroka V.A.1, Abdelsalam H.2, Demin V.A.3, Grassano D.4, Kuten S.A.1, Pushkarchuk A.L.1,5, Pulci O.4
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Affiliations:
- Institute for Nuclear Problems, Belarusian State University
- Department of Theoretical Physics, National Research Center
- Emanuel Institute of Biochemical Physics, RAS
- Department of Physics, University of Rome Tor Vergata
- Institute of Physical Organic Chemistry, NAS
- Issue: Vol 52, No 14 (2018)
- Pages: 1890-1893
- Section: Graphene
- URL: https://journals.rcsi.science/1063-7826/article/view/205133
- DOI: https://doi.org/10.1134/S1063782618140269
- ID: 205133
Cite item
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.
About the authors
V. A. Saroka
Institute for Nuclear Problems, Belarusian State University
Author for correspondence.
Email: 40.ovasil@gmail.com
Belarus, Minsk, 220030
H. Abdelsalam
Department of Theoretical Physics, National Research Center
Email: 40.ovasil@gmail.com
Egypt, Cairo, 12622
V. A. Demin
Emanuel Institute of Biochemical Physics, RAS
Email: 40.ovasil@gmail.com
Russian Federation, Moscow, 119334
D. Grassano
Department of Physics, University of Rome Tor Vergata
Email: 40.ovasil@gmail.com
Italy, Via della Ricerca Scientifica 1, Rome, I-00133
S. A. Kuten
Institute for Nuclear Problems, Belarusian State University
Email: 40.ovasil@gmail.com
Belarus, Minsk, 220030
A. L. Pushkarchuk
Institute for Nuclear Problems, Belarusian State University; Institute of Physical Organic Chemistry, NAS
Email: 40.ovasil@gmail.com
Belarus, Minsk, 220030; Minsk, 220072
O. Pulci
Department of Physics, University of Rome Tor Vergata
Email: 40.ovasil@gmail.com
Italy, Via della Ricerca Scientifica 1, Rome, I-00133