Mobile small polaron

Details Mobile small polaron Mobile small polaron

1998-08-18

arxiv.org/abs/cond-mat/9808198v2

Phys. Rev. Lett. v.82, 807 (1999)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures, published version

Scientific paper

10.1103/PhysRevLett.82.807

Extending the Froehlich polaron problem to a discrete ionic lattice we study a polaronic state with a small radius of the wave function but a large size of the lattice distortion. We calculate the energy dispersion and the effective mass of the polaron with the 1/\lambda perturbation theory and with the exact Monte Carlo method in the nonadiabatic and adiabatic regimes, respectively. The ``small'' Froehlich polaron is found to be lighter than the small Holstein polaron by one or more orders of magnitude.

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