Path integral approach to the Anderson-Holstein model

초록

The Anderson-Holstein model is studied in the framework of the semiclassical approximation. Analytical results for the Kondo temperature renormalized by a weak electron-phonon interaction and for the phonon Green function are obtained, and they are interpreted from the viewpoint of dynamical mean field theory. In particular, the isotope effect of the effective electron mass is discussed in the presence of strong electron correlation. The results are also compared with those obtained by numerical renormalization group and other related work, and they are consistent with each other in their common domain of validity.

키워드