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Effect of different site energies on polaronic properties

  • Solid and Condensed State Physics
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Abstract.

A two-site single polaron Holstein model is studied in presence of a difference in bare site energies (epsilond=epsilon2-epsilon1) using the perturbation theory with the variational modified Lang-Firsov (MLF) phonon basis. The polaronic ground-state wave function is calculated up to the fifth order of perturbation. The effect of epsilond (acts as a strength of diagonal disorder) on the polaron crossover, polaronic kinetic energy, oscillator wavefuncion and polaron localization are studied. Considering a double-exchange Holstein model with finite epsilond, role of disorder on the properties of the double-exchange system is also discussed.

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Authors and Affiliations

  1. Theoretical Condensed Matter Physics Group, Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata, 700064, India

    J. Chatterjee & A. N. Das

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  1. J. Chatterjee
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  2. A. N. Das
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Correspondence to J. Chatterjee.

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Chatterjee, J., Das, A. Effect of different site energies on polaronic properties. Eur. Phys. J. B 46, 481–488 (2005). https://doi.org/10.1140/epjb/e2005-00277-1

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