Bridge-mediated Donor-Acceptor Effective Coupling: Exact theoretical description
Soft Condensed Matter
2007-05-23 v1 Mesoscale and Nanoscale Physics
Abstract
An exact expression of the bridge-mediated donor-acceptor effective coupling, is derived. For systems represented by a tight-binding Hamiltonian with nearest-neighbor interactions, we show that the effective coupling, is equal to the product over all square of nearest-neighbor couplings divided by an appropriate product of level spacing of eigen energies of the Hamiltonian. Results of this calculation are compared to those obtained by perturbative approaches and some drawbacks of the latter are pointed out.
Cite
@article{arxiv.cond-mat/0502242,
title = {Bridge-mediated Donor-Acceptor Effective Coupling: Exact theoretical description},
author = {D. J. Bicout and F. Varchon and E. Kats},
journal= {arXiv preprint arXiv:cond-mat/0502242},
year = {2007}
}
Comments
4 pages, submitted to Europhysics Letters