AI Article Synopsis
- The optical properties of graphane are primarily influenced by localized charge-transfer excitations resulting from increased electron correlations in a 2D dielectric environment.
- Strong interactions between electrons and holes create small radius bound excitons, with the electron and hole being spatially separated—one localized out of plane and the other in plane.
- This discovery of bound excitons suggests the possibility of achieving an excitonic Bose-Einstein condensate in graphane, which may be experimentally observable.
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.
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| http://dx.doi.org/10.1103/PhysRevLett.104.226804 | DOI Listing |
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