Surface Polaron Formation in the Holstein model

Abstract

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.

5 pages, 3 figures

References in corpus (8)

• Electronic Structure Calculations with Dynamical Mean-Field Theory: A Spectral Density Functional Approach
• The Green's Function of the Holstein Polaron
• Optical conductivity and the correlation strength of high temperature copper-oxide superconductors
• Kondo proximity effect: How does a metal penetrate into a Mott insulator?
• Surface dead layer for quasiparticles near a Mott transition
• Synergistic Polaron Formation in the Hubbard-Holstein Model at Small Doping
• Polaron Crossover and Bipolaronic Metal-Insulator Transition in the Holstein model at half-filling
• Embedding approach for dynamical mean field theory of strongly correlated heterostructures

Cited by in corpus (6)

• Surface effects in doping a Mott insulator
• Metallic surface of a bipolaronic insulator
• Inhomogeneous dynamical mean field theory of the small polaron problem
• Competition between reduced delocalization and charge transfer effects for a two-band Hubbard model
• Persistent metal-insulator transition at the surface of an oxygen-deficient, epitaxial manganite film
• Embedding Dynamical Mean-Field Theory for Superconductivity in Layered Materials and Heterostructures