Cooper pair splitting and recombination in a nanoSQUID geometry at high transparency
| Autor: | Alex Zazunov, R. Jacquet, Thibaut Jonckheere, Thierry Martin, Jérôme Rech |
|---|---|
| Přispěvatelé: | Centre de Physique Théorique - UMR 7332 (CPT), Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), CPT - E6 Nanophysique, Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Institut für Theoretische Physik, Heinrich Heine Universität Düsseldorf = Heinrich Heine University [Düsseldorf], Aix Marseille Université (AMU), ANR-12-BS10-0007,NANOQUARTETS,Production de Quartets d'Electrons dans des Bijonctions Josephson(2012) |
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Superconductivity
Physics Condensed matter physics Nanowire 02 engineering and technology Electron 021001 nanoscience & nanotechnology Condensed Matter Physics Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 01 natural sciences Electronic Optical and Magnetic Materials Andreev reflection [PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con] Quantum dot Quantum mechanics Condensed Matter::Superconductivity 0103 physical sciences Path integral formulation Cooper pair 010306 general physics 0210 nano-technology Quantum tunnelling [PHYS.COND.CM-MSQHE]Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall] |
| Zdroj: | Physical Review B: Condensed Matter and Materials Physics (1998-2015) Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2015, 92 (23), pp.235429. ⟨10.1103/PhysRevB.92.235429⟩ Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2015, 92 (23), pp.235429. ⟨10.1103/PhysRevB.92.235429⟩ |
| ISSN: | 1098-0121 1550-235X |
| Popis: | 12 pages, 13 figures; International audience; We describe a Josephson device composed of two superconductors separated by two interacting quantum dots in parallel, as a probe for Cooper pair splitting. In addition to sequential tunneling of electrons through each dot, an additional transport channel exists in this system: crossed Andreev reflection, where a Cooper pair from the source is split between the two dots and recombined in the drain superconductor. Unlike non-equilibrium scenarios for Cooper pair splitting which involves superconducting/normal metal "forks", our proposal relies on an Aharonov-Bohm measurement of the DC Josephson current when a flux is inserted between the two dots. We provide a path integral approach to treat arbitrary transparencies, and we explore all contributions for the individual phases ($0$ or $\pi$) of the quantum dots. We propose a definition of the Cooper pair splitting efficiency for arbitrary transparencies, which allows us to find the phase associations which favor the crossed Andreev process. Possible applications to experiments using nanowires as quantum dots are discussed. |
| Databáze: | OpenAIRE |
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