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Bound excitons in Sr2CuO3.
Journal article

Bound excitons in Sr2CuO3.

  • Kim KW Department of Physics, University of Fribourg, Chemin du Muse 3, Fribourg, Switzerland. kyungwan.kim@gmail.com
  • Gu GD
  • Homes CC
  • Noh TW
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  • 2008-11-13
Published in:
  • Physical review letters. - 2008
General Physics and Astronomy
English We investigated temperature dependent optical spectra of the one-dimensional chain compound Sr2CuO3. The charge transfer transition polarized along the chain direction shows a strongly asymmetric line shape as expected in one-dimensional extended Hubbard model. At low temperature, the charge transfer peak shows a large blueshift and reveals additional sharp peaks at the gap. Even though many spectroscopic studies suggest that this material cannot have a bound exciton based on the one-dimensional extended Hubbard model, we attribute the additional sharp peaks to excitons, which come to exist due to the long-range Coulomb interaction.
Language
  • English
Open access status
closed
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Persistent URL
https://folia.unifr.ch/global/documents/130293
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