We investigate from first principles the electronic and optical properties of edge-modulated armchair graphene nanoribbons, including both quasiparticle corrections and excitonic effects. Exploiting the oscillating behavior of the ribbon energy gap, we show that minimal width-modulations are sufficient to obtain confinement of both electrons and holes, thus forming optically active quantum dots with unique properties, such as the coexistence of dotlike and extended excitations and the fine tunability of optical spectra, with great potential for optoelectronic applications. © 2011 American Physical Society.
Quantum dot states and optical excitations of edge-modulated graphene nanoribbons / Deborah, Prezzi; Varsano, Daniele; Alice, Ruini; Elisa, Molinari. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - STAMPA. - 84:4(2011), p. 041401. [10.1103/physrevb.84.041401]
Scheda prodotto non validato
Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo
Titolo: | Quantum dot states and optical excitations of edge-modulated graphene nanoribbons | |
Autori: | ||
Data di pubblicazione: | 2011 | |
Rivista: | ||
Citazione: | Quantum dot states and optical excitations of edge-modulated graphene nanoribbons / Deborah, Prezzi; Varsano, Daniele; Alice, Ruini; Elisa, Molinari. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - STAMPA. - 84:4(2011), p. 041401. [10.1103/physrevb.84.041401] | |
Handle: | http://hdl.handle.net/11573/386169 | |
Appartiene alla tipologia: | 01a Articolo in rivista |