Electron Transfer in Donor-Acceptor Systems: Many-Particle Effects and Influence of Electronic Correlations

Details Electron Transfer in Donor-Acceptor Systems: Many-Particle Effects and Influence of Electronic Correlations Electron Transfer in Donor-Acceptor Systems: Many-Particle Effects and Influence of Electronic Correlations

2005-02-11

arxiv.org/abs/cond-mat/0502276v1

Europhys. Lett. 73, 913 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures

Scientific paper

10.1209/epl/i2005-10479-1

We investigate electron transfer processes in donor-acceptor systems with a coupling of the electronic degrees of freedom to a common bosonic bath. The model allows to study many-particle effects and the influence of the local Coulomb interaction U between electrons on donor and acceptor sites. Using the non-perturbative numerical renormalization group approach we find distinct differences between the electron transfer characteristics in the single- and two-particle subspaces. We calculate the critical electron-boson coupling alpha_c as a function of $U$ and show results for density-density correlation functions in the whole parameter space. The possibility of many-particle (bipolaronic) and Coulomb-assisted transfer is discussed.

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