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Raman scattering for weakened bonds in the intermediate state: enhancement of low-frequency vibrations

  • Solid State and Materials
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Abstract

A multimode theory of the Raman scattering in resonance with an electronic transition causing a strong weakening of atomic bonds is proposed. Simple analytical relations between the Fourier transforms of the first- and second-order Raman amplitudes and the absorption are derived. It is predicted that the Raman scattering on low-frequency vibrations will be strongly enhanced. Besides the second-order Raman scattering is also enhanced as compared to the first-order scattering. The Raman excitation profiles show a structure caused by the Airy oscillations. The shapes of the profiles of all vibrations contributing to the weakening bond are the same as a consequence of the strong mode mixing under the virtual vibronic transition.

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Authors and Affiliations

  1. Institute of Physics, University of Tartu, Riia 142, 51014, Tartu, Estonia

    V. Hizhnyakov, I. Tehver & V. Boltrushko

  2. Donostia International Physics Center, Paseo Manuel de Lardizàbal 4, 20018, Donostia, San Sebastian, Spain

    G. Benedek

  3. Dipartimento di Scienza dei Materiali, Università degli Studi di Milano-Bicocca, 20125, Milano, Italy

    G. Benedek

Authors
  1. V. Hizhnyakov
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  2. I. Tehver
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  3. V. Boltrushko
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  4. G. Benedek
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Correspondence to V. Hizhnyakov.

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Hizhnyakov, V., Tehver, I., Boltrushko, V. et al. Raman scattering for weakened bonds in the intermediate state: enhancement of low-frequency vibrations. Eur. Phys. J. B 75, 187–195 (2010). https://doi.org/10.1140/epjb/e2010-00135-1

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  • DOI: https://doi.org/10.1140/epjb/e2010-00135-1

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