Interplay between Josephson effect and magnetic interactions in double quantum dots

Abstract

We analyze the magnetic and transport properties of a double quantum dot coupled to superconducting leads. In addition to the possible phase transition to a $\pi$ state, already present in the single dot case, this system exhibits a richer magnetic behavior due to the competition between Kondo and inter-dot antiferromagnetic coupling. We obtain results for the Josephson current which may help to understand recent experiments on superconductor-metallofullerene dimer junctions. We show that in such a system the Josephson effect can be used to control its magnetic configuration.

5 pages, 4 figures

References in corpus (3)

• Strongly correlated regimes in a double quantum-dot device
• Electronic transport, structure, and energetics of endohedral Gd@C82 metallofullerenes
• Tuning the Non-local Spin-Spin Interaction between Quantum Dots with a Magnetic Field

Cited by in corpus (6)

• Even-odd effect in Andreev Transport through a Carbon Nanotube Quantum Dot
• Real-time diagrammatic approach to transport through interacting quantum dots with normal and superconducting leads
• Controllable pi junction in a Josephson quantum-dot device with molecular spin
• Josephson Effect through an isotropic magnetic molecule
• Josephson effect through a quantum dot array
• Superconducting non-equilibrium transport through a weakly interacting quantum dot