Switching in molecular transport junctions: Polarization response

Sina Yeganeh, Michael Galperin, Mark A. Ratner*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

73 Scopus citations


We discuss several proposed explanations for the switching and negative differential resistance (NDR) behavior seen in some molecular junctions. Several theoretical models are discussed, and we present results of electronic structure calculations on a series of substituted oligo(phenylene ethynylene) molecules. It is shown that a previously proposed polaron model is successful in predicting NDR behavior, and the model is elaborated with image charge effects and parameters from electronic structure calculations. This model now incorporates substituent effects and includes the effects of conformational change, charging, and image charge stabilization.

Original languageEnglish (US)
Pages (from-to)13313-13320
Number of pages8
JournalJournal of the American Chemical Society
Issue number43
StatePublished - Oct 31 2007

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry


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