Support

1. MCW07 Physics of Contact Induced Current Asymmetry in Transport Through Molecules

   0.0 out of 5 stars 

   25 Feb 2008 | Online Presentations | Contributor(s): Bhaskaran Muralidharan, Owen D. Miller, Neeti Kapur, Avik Ghosh, Supriyo Datta

   We first outline the qualitatively different physics involved in the charging-induced current asymmetries in molecular conductors operating in the strongly coupled (weakly interacting) self-consistent field (SCF) and the weakly coupled (strongly interacting) Coulomb Blockade (CB) regimes. The CB regime, dominated by single charge effects, typically requires a computationally demanding many-electron or Fock space description.
   
   Our analysis of several molecular Coulomb Blockade measurements reveal that many novel signatures can be explained using a “simpler” orthodox model that involves an incoherent sum of Fock space excitations and hence treats the molecule as a “metallic dot” or an “island”. This also reduces the complexity of the Fock space description by just including various charge configurations only, thus partially underscoring the importance of electronic structure, while retaining the essence of the single charge nature of the transport process.

Top 1 shown