Critical Josephson current through a bistable single-molecule junction
Superconductivity
2015-05-13 v2 Mesoscale and Nanoscale Physics
Abstract
We compute the critical Josephson current through a single-molecule junction. As a model for a molecule with a bistable conformational degree of freedom, we study an interacting single-level quantum dot coupled to a two-level system and weakly connected to two superconducting electrodes. We perform a lowest-order perturbative calculation of the critical current and show that it can significantly change due to the two-level system. In particular, the \pi-junction behavior, generally present for strong interactions, can be completely suppressed.
Cite
@article{arxiv.0903.2007,
title = {Critical Josephson current through a bistable single-molecule junction},
author = {Andreas Schulz and Alex Zazunov and Reinhold Egger},
journal= {arXiv preprint arXiv:0903.2007},
year = {2015}
}
Comments
7 pages, 5 figures; v2: minor changes, to be published in Phys. Rev. B