Asymmetry in negative differential resistance driven by electron-electron interactions in two-site molecular devices

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Abstract

We demonstrate that Coulomb interactions within the Hartree-Fock approximation can induce a strong asymmetry in the negative differential resistance of a two-site resonant molecular device. This sharp cutoff at high voltage is generic and independent of the detailed single-particle electronic structure of the system. The intersite coupling between distinct molecular subunits controls a transition from staircase to resonant current-voltage characteristics. These studies clarify the relationship between weak screening and strong nonlinearity.

Original languageEnglish (US)
Pages (from-to)2829-2831
Number of pages3
JournalApplied Physics Letters
Volume79
Issue number17
DOIs
StatePublished - Oct 22 2001

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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