Mediation of Long Range Charge Transfer by Kondo Bound States

Details Mediation of Long Range Charge Transfer by Kondo Bound States Mediation of Long Range Charge Transfer by Kondo Bound States

2000-09-01

arxiv.org/abs/cond-mat/0009018v3

Physics

Condensed Matter

Strongly Correlated Electrons

Revised content (broadened scope, vibrations added), submitted to Phys Rev Lett, added author

Scientific paper

We present a theory of non-equilibrium 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$\AA$, 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.

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