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Effect of different site energies on polaronic properties

Jayita Chatterjee·A. N. Das
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Abstract

Using the perturbation method based on a variational phonon basis obtained by the modified Lang-Firsov (MLF) transformation, the two-site single polaron Holstein model is studied in presence of a difference in bare site energies ($ε_d$=$ε_2$-$ε_1$). The polaronic ground-state wave function is calculated up to the fifth order of perturbation. The effect of $ε_d$ (acts as a site-energy disorder) on the polaron crossover, polaronic kinetic energy, oscillator wavefuncion and polaron localization are studied. Considering a double-exchange Holstein model with finite $ε_d$, role of disorder on the properties of the double-exchange system is also discussed.

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Jayita Chatterjee, A. N. Das. 2005-02-24. Effect of different site energies on polaronic properties. https://doi.org/10.1140/epjb%2Fe2005-00277-1

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