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Spatial dispersion of the lattice polarizability and the properties of the large polaron

Physics of the Solid State, ISSN: 1063-7834, Vol: 50, Issue: 1, Page: 16-21
2008
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  • Citations
    2
    • Citation Indexes
      2

Article Description

The polaron states are studied in crystals with optical phonon dispersion of the type ω(k) = ω + u k . The appearance and propagation of a local polarization in such a medium is treated as the evolution of a wave packet having a nonzero group velocity. This approach enables one to construct a consistent theory of moving self-trapped electron. The total energy and the effective mass of a slowly moving polaron are found and are shown to be strongly dependent on the dispersion parameter σ = u/ω. © 2008 Pleiades Publishing, Ltd.

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