Polaron features of the one-dimensional Holstein Molecular Crystal Model

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 ${\omega }_0/t$ is found and a polaron phase diagram is proposed.

12 pages, 2 figures

References in corpus (1)

• A new variational approach for the Holstein Molecular Crystal Model

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