Related Experiment Videos
Mediation of long range charge transfer by Kondo bound States
R G Endres1, D L Cox, R R P Singh
1Department of Physics, University of California, Davis, California 95616, USA.
Physical Review Letters
|April 17, 2002
Abstract:
We present a theory of nonequilibrium long range charge transfer between donor and acceptor centers in a model polymer mediated by magnetic exciton (Kondo) bound states. Our model produces electron tunneling lengths easily exceeding 10 A, as observed recently in DNA and organic charge transfer systems. This long ranged tunneling is effective for weak to intermediate donor-bridge coupling, and is enhanced both by weak to intermediate strength Coulomb hole-electron attraction (through the orthogonality catastrophe) and by coupling to local vibrational modes.