Momentum dependence of the excitons in pentacene

Friedrich Roth; Roman Schuster; Andreas König; Martin Knupfer; Helmuth Berger

doi:10.1063/1.4723812

Momentum dependence of the excitons in pentacene

Materials Science 2012-06-01 v1

Authors: Friedrich Roth , Roman Schuster , Andreas König , Martin Knupfer , Helmuth Berger

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Abstract

We have carried out electron energy-loss investigations of the lowest singlet excitons in pentacene at 20 K. Our studies allow to determine the full exciton band structure in the a*,b* reciprocal lattice plane. The lowest singlet exciton can move coherently within this plane, and the resulting exciton dispersion is highly anisotropic. The analysis of the energetically following (satellite) features indicates a strong admixture of charge transfer excitations to the exciton wave function.

Keywords

pentacene excitons exciton band structure electron energy-loss spectroscopy anisotropic dispersion charge transfer excitations

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@article{arxiv.1205.4819,
  title  = {Momentum dependence of the excitons in pentacene},
  author = {Friedrich Roth and Roman Schuster and Andreas König and Martin Knupfer and Helmuth Berger},
  journal= {arXiv preprint arXiv:1205.4819},
  year   = {2012}
}

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13 pages, 4 figures

Momentum dependence of the excitons in pentacene

Abstract

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