Inelastic scattering in a local polaron model with quadratic coupling to bosons

Details Inelastic scattering in a local polaron model with quadratic coupling to bosons Inelastic scattering in a local polaron model with quadratic coupling to bosons

2009-03-10

arxiv.org/abs/0903.1786v1

Phys. Rev. B. 79 235414 (2009)

Physics

Condensed Matter

Materials Science

Scientific paper

10.1103/PhysRevB.79.235414

We calculate the inelastic scattering probabilities in the wide band limit of a local polaron model with quadratic coupling to bosons. The central object is a two-particle Green function which is calculated exactly using a purely algebraic approach. Compared with the usual linear interaction term a quadratic interaction term gives higher probabilities for inelastic scattering involving a large number of bosons. As an application we consider the problem hot electron mediated energy transfer at surfaces and use the delta self-consistent field extension of density functional theory to calculate and compare coupling parameters and probabilities for exciting different vibrational modes of CO adsorbed on a Cu(100) surface.

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