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Nuclear coupling and polarization in molecular transport junctions : beyond tunneling to function

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Galperin, M., Ratner, Mark A., Nitzan, Abraham and Troisi, Alessandro (2008) Nuclear coupling and polarization in molecular transport junctions : beyond tunneling to function. Science, Vol.319 (No.5866). pp. 1056-1060. doi:10.1126/science.1146556

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Official URL: http://dx.doi.org/10.1126/science.1146556

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Abstract

Much current experimental research on transport in molecular junctions focuses on finite voltages, where substantial polarization- induced nonlinearities may result in technologically relevant device- type responses. Because molecules have strong polarization responses to changing charge state or external field, molecules isolated between electrodes can show strongly nonlinear current- voltage responses. For small applied voltages ( up to similar to 0.3 volt), weak interaction between transporting electrons and molecular vibrations provides the basis for inelastic electron tunneling spectroscopy. At higher voltages and for certain time scale regimes, strong coupling effects occur, including Coulomb blockade, negative differential resistance, dynamical switching and switching noise, current hysteresis, heating, and chemical reactions. We discuss a general picture for such phenomena that arise from charging, strong correlation, and polarization ( electronic and vibrational) effects in the molecule and at the interface.

Item Type: Journal Item
Subjects: Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Science > Chemistry
Faculty of Science > Centre for Scientific Computing
Library of Congress Subject Headings (LCSH): Polarization (Electricity), Tunneling (Physics), Charge transfer, Molecular electronics, Collisions (Nuclear physics)
Journal or Publication Title: Science
Publisher: American Association for the Advancement of Science
ISSN: 0036-8075
Official Date: 22 February 2008
Dates:
DateEvent
22 February 2008Published
Volume: Vol.319
Number: No.5866
Number of Pages: 5
Page Range: pp. 1056-1060
DOI: 10.1126/science.1146556
Status: Peer Reviewed
Publication Status: Published

Data sourced from Thomson Reuters' Web of Knowledge

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