Self-energy correction to dynamic polaron responses.
We present the first-order self-energy correction to the linear response coefficients of polaronic systems within the truncated phase space approach developed by the present authors. Due to the system-bath coupling, the external perturbation induces a retarded internal field which dynamically screens the external force. Whereas the effect on the mobility is of second order, dynamical properties such as the effective mass and the optical absorption are modified in first order. The Fröhlich polaron is used to illustrate the results.
Physics Department, University of Antwerp, Universiteitsplein 1, 2060 Antwerpen, Belgium.
Dries
D
Sels
Physics Department, University of Antwerp, Universiteitsplein 1, 2060 Antwerpen, Belgium.
Fons
F
Brosens