Odd-triplet superconductivity in single-level quantum dots

Abstract

We study the interplay of spin and charge coherence in a single-level quantum dot. A tunnel coupling to a superconducting lead induces superconducting correlations in the dot. With full spin symmetry retained, only even-singlet superconducting correlations are generated. An applied magnetic field or attached ferromagnetic leads partially or fully reduce the spin symmetry, and odd-triplet superconducting correlations are generated as well. For single-level quantum dots, no other superconducting correlations are possible. We analyze, with the help of a diagrammatic real-time technique, the interplay of spin symmetry and superconductivity and its signatures in electronic transport, in particular current and shot noise.

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Cited by in corpus (13)

• Nonlocal thermoelectricity in a Cooper-pair splitter
• Phase-dependent heat and charge transport through superconductor-quantum dot hybrids
• Odd-frequency Superconductivity Revealed by Thermopower
• Odd-frequency superconductivity near a magnetic impurity in a conventional superconductor
• Fractional Josephson effect versus fractional charge in superconducting-normal metal hybrid circuits
• Superconductor-quantum dot hybrid coolers
• Odd-frequency superconductivity in dilute magnetic superconductors
• Odd-frequency superconductivity induced by non-magnetic impurities
• Signatures of odd-frequency pairing in the Josephson junction current noise
• Pair-amplitude dynamics in strongly-coupled superconductor-quantum dot hybrids
• Statistical correlations of currents flowing via proximized quantum dot
• Single-photon pump by Cooper-pair splitting
• Current precision in interacting hybrid Normal-Superconducting systems