Abstract
The ground-state energy of polarons in strong- and weak-coupling surface, interface materials is investigated by a concise purely two-dimensional polaron model. Phonon correlation is introduced in phonon coherent state to represent the wavefunction of the system. A self-consistent integral nonlinear equation satisfied by the distribution function of the energy is derived. Numerical calculations for the ground-state energy and binding energy of polarons in different type materials are performed using iteration method. Results are obtained in a wide range of coupling constant and are found to be lower than those of previous calculations.
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