# Excitonic effects on the optical response of graphene and bilayer graphene.

@article{Yang2009ExcitonicEO,
title={Excitonic effects on the optical response of graphene and bilayer graphene.},
author={Li Yang and Jack R. Deslippe and Cheol-Hwan Park and Marvin L. Cohen and Steven G. Louie},
journal={Physical review letters},
year={2009},
volume={103 18},
pages={
186802
}
}
• Li Yang, +2 authors S. Louie
• Published 2009
• Materials Science, Medicine, Physics
• Physical review letters
We present first-principles calculations of many-electron effects on the optical response of graphene, bilayer graphene, and graphite employing the GW-Bethe Salpeter equation approach. We find that resonant excitons are formed in these two-dimensional semimetals. The resonant excitons give rise to a prominent peak in the absorption spectrum near 4.5 eV with a different line shape and significantly redshifted peak position from those of an absorption peak arising from interband transitions in an… Expand
433 Citations

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#### References

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