Termini effects on the optical properties of graphene nanoribbons

We investigate from first principles the optical response of finite-length armchair-edged graphene nanoribbons (AGNRs) within the framework of many-body perturbation theory. As a result of the explicit inclusion of zigzag extremities, we identify low-energy and low-intensity excitations that are exp...

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Bibliographic Details
Published in:The European physical journal. B, Condensed matter physics Condensed matter physics, 2018-11, Vol.91 (11), Article 286
Main Authors: Cardoso, Claudia, Ferretti, Andrea, Prezzi, Deborah
Format: Article
Language:English
Subjects:
Complex Systems
Condensed Matter Physics
First principles
Fluid- and Aerodynamics
Graphene
Graphite
Nanoribbons
Optical properties
Perturbation theory
Photoluminescence
Physics
Physics and Astronomy
Regular Article
Solid State Physics
Topical issue: Special issue in honor of Hardy Gross
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Summary:We investigate from first principles the optical response of finite-length armchair-edged graphene nanoribbons (AGNRs) within the framework of many-body perturbation theory. As a result of the explicit inclusion of zigzag extremities, we identify low-energy and low-intensity excitations that are expected to be almost independent of the GNR length. These excitations coexist with bulk-like excitations, which have the same origin as the ones characterizing infinite AGNRs. Our results are used to rationalize termini effects on the optical response of GNRs and to shed light on recent photoluminescence data.
ISSN:1434-6028
1434-6036
DOI:10.1140/epjb/e2018-90179-4