Work

Strong Charge-Transfer Excitonic Effects and the Bose-Einstein Exciton Condensate in Graphane

Year: 2010

Type: article

Abstract: Using first principles many-body theory methods (GW+Bethe-Salpeter equation) we demonstrate that the optical properties of graphane are dominated by localized charge-transfer excitations governed by enhanced electron correlations in a two-dimensional dielectric medium. Strong electron-hole interaction leads to the appearance of small radius bound excitons with spatially separated electron and hole, which are localized out of plane and in plane, respectively. The presence of such bound excitons opens the path towards an excitonic Bose-Einstein condensate in graphane that can be observed experimentally.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.104.226804

Authors: Pierluigi Cudazzo, Claudio Attaccalite, Ilya V. Tokatly, Angel Rubio

Institutions: Consejo Superior de Investigaciones Científicas, University of the Basque Country, Material Physics Center, Centre National de la Recherche Scientifique, Université Joseph Fourier, Institut Néel, Ikerbasque, Fritz Haber Institute of the Max Planck Society

Language: English

Topic: Graphene research and applications

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W2095608461

FWCI: 4.618

Cites: 27

Cited by: 217

Related to: 10