Phys. Rev. Lett. 88, 166601 (2002) [4 pages]Mediation of Long Range Charge Transfer by Kondo Bound States |
PRL Celebrates 50 Years
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R. G. Endres, D. L. Cox, R. R. P. Singh, and S. K. Pati *
Department of Physics, University of California, Davis, California 95616
Received 15 May 2001; published 4 April 2002
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 Å, 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.
©2002 The American Physical Society
URL: http://link.aps.org/abstract/PRL/v88/e166601
DOI: 10.1103/PhysRevLett.88.166601
PACS: 72.15.Qm, 85.65.+h, 87.15.-v
* Also at Theoretical Sciences Unit, JNCASR Jakkur Campus, Bangalore 560064, India.
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