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| Paper IPM / Physic / 11183 |
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| Abstract: | |||||||
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The effect of a solid-vacuum interface on the properties of a strongly coupled electron-phonon system is
analyzed using dynamical mean-field theory to solve the Holstein model in a semi-infinite cubic lattice. Polaron
formation is found to occur more easily (i.e., for a weaker electron-phonon coupling) on the surface than in the
bulk. On the other hand, the metal-insulator transition associated to the binding of polarons takes place at a
unique critical strength in the bulk and at the surface.
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