Supercurrent in a Double Quantum Dot
| Autor: | J. C. Estrada Saldaña, Jens Paaske, G. Steffensen, Jesper Nygård, Alexandros Vekris, Peter Krogstrup, Kasper Grove-Rasmussen, Rok Žitko |
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| Rok vydání: | 2018 |
| Předmět: |
Condensed Matter::Quantum Gases
Josephson effect Superconductivity Physics Condensed matter physics Condensed Matter - Mesoscale and Nanoscale Physics Supercurrent Nanowire FOS: Physical sciences General Physics and Astronomy 02 engineering and technology Classification of discontinuities 021001 nanoscience & nanotechnology Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 01 natural sciences Condensed Matter::Superconductivity Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences 010306 general physics 0210 nano-technology Realization (systems) Anderson impurity model Energy (signal processing) |
| Zdroj: | Physical Review Letters |
| ISSN: | 0031-9007 0038-5646 0021-3640 |
| DOI: | 10.1103/physrevlett.121.257701 |
| Popis: | We demonstrate the Josephson effect in a serial double quantum dot defined in a nanowire with epitaxial superconducting leads. The supercurrent stability diagram adopts a honeycomb pattern with electron-hole and left-right reflection symmetry. We observe sharp discontinuities in the magnitude of the critical current, $I_c$, as a function of dot occupation, related to doublet to singlet ground state transitions. Detuning of the energy levels offers a tuning knob for $I_c$, which attains a maximum at zero detuning. The consistency between experiment and theory indicates that our device is a faithful realization of the two-impurity Anderson model. 6 pages, 5 figures, Supplemental Material available as ancillary file |
| Databáze: | OpenAIRE |
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