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J. Chem. Phys. 136, 044107 (2012); http://dx.doi.org/10.1063/1.3676047 (7 pages)

Coherently controlled molecular junctions

Uri Peskin1 and Michael Galperin2

1Schulich Faculty of Chemistry and the Lise Meitner Center for Computational Quantum Chemistry, Technion-Israel Institute of Technology, Haifa 32000, Israel
2Department of Chemistry and Biochemistry, University of California at San Diego, La Jolla, California 92093, USA

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(Received 25 October 2011; accepted 20 December 2011; published online 30 January 2012)

Within a generic model, we discuss the possibility of coherent control of charge fluxes in unbiased molecular junctions. The control is induced by resonances between the Rabi frequency due to a pumping laser field and internal characteristic frequencies of pre-designed molecular donor-bridge-acceptor complexes. Two models are considered: a coherently controlled molecular charge pump and a molecular switch. The study generalizes previous consideration of light induced current [M. Galperin and A. Nitzan, Phys. Rev. Lett. 95, 206802 (2005)10.1103/PhysRevLett.95.206802] and of a molecular electron pump [R. Volkovich and U. Peskin, Phys. Rev. B 83, 033403 (2011)10.1103/PhysRevB.83.033403] and accounts for the coherently driven charge transport in an unbiased molecular junction with symmetric coupling to leads. Numerical examples demonstrate the feasibility of the control mechanism for realistic junctions parameters.

© 2012 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. MODEL AND METHOD
  3. RESULTS AND DISCUSSION
  4. CONCLUSION

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KEYWORDS, PACS, and IPC

PACS

  • 85.65.+h

    Molecular electronic devices

  • 84.30.Jc

    Power electronics; power supply circuits

International Patent Classification (IPC)

  • H02M

    Apparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems; Conversion of dc or ac input power into surge output power; Control or regulation thereof

ARTICLE DATA

PUBLICATION DATA

ISSN

0021-9606 (print)  
1089-7690 (online)

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