Comparison of tunneling through molecules with Mott-Hubbard and with dimerization gaps
Strongly Correlated Electrons
2009-10-31 v1
Abstract
In order to study the tunneling of electrons through an interacting, 1D, dimerized molecule connected to leads, we consider the persistent current in a ring embedding this molecule. We find numerically that, for spinless fermions, a molecule with a gap mostly due to interactions, i.e. a Mott-Hubbard gap, gives rise to a larger persistent current than a molecule with the same gap, but due only to the dimerization. In both cases, the tunneling current decreases exponentially with the size of the molecule, but more slowly in the interacting case. Implications for molecular electronic are briefly discussed.
Keywords
Cite
@article{arxiv.cond-mat/9802031,
title = {Comparison of tunneling through molecules with Mott-Hubbard and with dimerization gaps},
author = {Julien Favand and Frederic Mila},
journal= {arXiv preprint arXiv:cond-mat/9802031},
year = {2009}
}
Comments
Revtex, 22 pages including 7 figures. To appear in European Physical Journal B