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

Pierluigi Cudazzo, Claudio Attaccalite, Ilya V. Tokatly, and Angel Rubio
Phys. Rev. Lett. 104, 226804 – Published 1 June 2010
PDFHTMLExport Citation

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.

  • Figure
  • Figure
  • Figure
  • Received 17 February 2010

DOI:https://doi.org/10.1103/PhysRevLett.104.226804

©2010 American Physical Society

Authors & Affiliations

Pierluigi Cudazzo1, Claudio Attaccalite2, Ilya V. Tokatly1,3, and Angel Rubio1,4

  • 1Nano-Bio Spectroscopy group and ETSF Scientific Development Centre, Dpto. Física de Materiales, Universidad del País Vasco, Centro de Física de Materiales CSIC-UPV/EHU-MPC and DIPC, Av. Tolosa 72, E-20018 San Sebastián, Spain
  • 2Institute Neel, CNRS-UJF, Grenoble, France
  • 3IKERBASQUE, Basque Foundation for Science, E-48011 Bilbao, Spain
  • 4Fritz-Haber-Institut der Max-Planck-Gesellschaft, Theory Department, Faradayweg 4-6, D-14195 Berlin-Dahlem, Germany

Article Text (Subscription Required)

Click to Expand

Supplemental Material (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 104, Iss. 22 — 4 June 2010

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×