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

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Cited by in corpus (29)

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• Even-odd effect in Andreev Transport through a Carbon Nanotube Quantum Dot
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• Josephson Effect through an isotropic magnetic molecule
• Josephson effect through a quantum dot array
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• Andreev spin-noise detector
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