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Polaron features of the one-dimensional Holstein Molecular Crystal Model

V. Cataudella·G. De Filippis·G. Iadonisi
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Abstract

The polaron features of the one-dimensional Holstein Molecular Crystal Model are investigated by improving a variational method introduced recently and based on a linear superposition of Bloch states that describe large and small polaron wave functions. The mean number of phonons, the polaron kinetic energy, the electron-phonon local correlation function, and the ground state spectral weight are calculated and discussed. A crossover regime between large and small polaron for any value of the adiabatic parameter $ω_0/t$ is found and a polaron phase diagram is proposed.

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V. Cataudella, G. De Filippis, G. Iadonisi. 2000-11-10. Polaron features of the one-dimensional Holstein Molecular Crystal Model. https://doi.org/10.1103/physrevb.62.1496

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