Issue |
Europhys. Lett.
Volume 73, Number 6, March 2006
|
|
---|---|---|
Page(s) | 913 - 919 | |
Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
DOI | https://doi.org/10.1209/epl/i2005-10479-1 | |
Published online | 10 February 2006 |
Electron transfer in donor-acceptor systems: Many-particle effects and influence of electronic correlations
1
Theoretische Physik III, Elektronische Korrelationen und Magnetismus Universität Augsburg - 86135 Augsburg, Germany
2
Institut für Theorie der Kondensierten Materie, Universität Karlsruhe 76128 Karlsruhe, Germany
Received:
6
October
2005
Accepted:
24
January
2006
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 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.
PACS: 71.27.+a – Strongly correlated electron systems; heavy fermions / 34.70.+e – Charge transfer / 82.39.Jn – Charge (electron, proton) transfer in biological systems
© EDP Sciences, 2006
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