Supercurrent in a double quantum dot
| Autor: | Saldaña, J. C. Estrada, Vekris, A., Steffensen, G., Žitko, R., Krogstrup, P., Paaske, J., Grove-Rasmussen, K., Nygård, J. |
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| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | Phys. Rev. Lett. 121, 257701 (2018) |
| Druh dokumentu: | Working Paper |
| 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. Comment: 6 pages, 5 figures, Supplemental Material available as ancillary file |
| Databáze: | arXiv |
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