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

18 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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rectification
histograms
Electrodes
electrodes
Molecules
line shape
molecules
asymmetry
causes
Electric potential
electric potential
symmetry

ASJC Scopus subject areas

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

Cite this

Is molecular rectification caused by asymmetric electrode couplings or by a molecular bias drop? / Zhang, Gaibo; Ratner, Mark A; Reuter, Matthew G.

In: Journal of Physical Chemistry C, Vol. 119, No. 11, 19.03.2015, p. 6254-6260.

Research output: Contribution to journalArticle

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