Josephson-current induced conformational switching of a molecular quantum dot

Abstract

We discuss the behavior of a two-level system coupled to a quantum dot contacted by superconducting source/drain electrodes, representing a simple model for the conformational degree of freedom of a molecular dot or a break junction. The Josephson current is shown to induce conformational changes, including a complete reversal. For small bias voltage, periodic conformational motions induced by Landau-Zener transitions between Andreev states are predicted.

4 pages, 2 figures, accepted to PRL

References in corpus (6)

• Supercurrent reversal in quantum dots
• Josephson current through a molecular transistor in a dissipative environment
• Coulomb Gas on the Keldysh Contour: Anderson-Yuval-Hamann representation of the Nonequilibrium Two Level System
• Josephson Effect through an isotropic magnetic molecule
• Spectrum of Andreev Bound States in a Molecule Embedded Inside a Microwave-Excited Superconducting Junction
• Two-level Physics in a Model Metallic Break Junction