Is molecular rectification caused by asymmetric electrode couplings or by a molecular bias drop?

Gaibo Zhang, Mark A. Ratner, Matthew G. Reuter

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

We investigate possible causes of molecular rectification in electrode-molecule-electrode junctions. By using a simple model and simulated conductance histograms, we show that a molecular bias drop is responsible for rectification; conversely, asymmetric molecule-electrode couplings do not directly result in rectification. Instead, the degree of coupling (a)symmetry can be observed in the line shapes of the conductance histograms used to experimentally assess the current-voltage properties of such molecular junctions. More coupling asymmetry leads to less positively skewed histogram peaks.

Original languageEnglish
Pages (from-to)6254-6260
Number of pages7
JournalJournal of Physical Chemistry C
Volume119
Issue number11
DOIs
Publication statusPublished - Mar 19 2015

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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