Tunable pseudogaps due to nonlocal coherent transport in voltage-biased three-terminal Josephson junctions

C. Padurariu, T. Jonckheere, J. Rech, T. Martin, D. Feinberg

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We investigate the proximity effect in junctions between N=3 superconductors under commensurate voltage bias. The bias is chosen to highlight the role of transport processes that exchange multiple Cooper pairs coherently between more than two superconductors. Such nonlocal processes can be studied in the dc response, where local transport processes do not contribute. We focus on the proximity-induced normal density of states that we investigate in a wide parameter space. We reveal the presence of deep and highly tunable pseudogaps and other rich structures. These are due to a static proximity effect that is absent for N=2 and is sensitive to an emergent superconducting phase associated to nonlocal coherent transport. In comparison with results for N=2, we find similarities in the signature peaks of multiple Andreev reflections. We discuss the effect of electron-hole decoherence and of various types of junction asymmetries. Our predictions can be investigated experimentally using tunneling spectroscopy.

Original languageEnglish
Article number205437
Pages (from-to)1-13
JournalPhysical Review B
Issue number20
Publication statusPublished - 30 May 2017
MoE publication typeA1 Journal article-refereed

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  • Projects

    Centre of Excellence in Low Temperature Quantum Phenomena and Devices

    Flindt, C.


    Project: Academy of Finland: Other research funding

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