التفاصيل البيبلوغرافية
| العنوان: |
Diode effect in Josephson junctions with a single magnetic atom |
| المؤلفون: |
Martina Trahms, Larissa Melischek, Jacob F. Steiner, Bharti Mahendru, Idan Tamir, Nils Bogdanoff, Olof Peters, Gaël Reecht, Clemens B. Winkelmann, Felix Oppen, Katharina J. Franke |
| المصدر: |
Nature, Nature. 615(7953):628-633 |
| سنة النشر: |
2023 |
| الوصف: |
Current flow in electronic devices can be asymmetric with bias direction, a phenomenon underlying the utility of diodes1 and known as non-reciprocal charge transport2. The promise of dissipationless electronics has recently stimulated the quest for superconducting diodes, and non-reciprocal superconducting devices have been realized in various non-centrosymmetric systems3–10. Here we investigate the ultimate limits of miniaturization by creating atomic-scale Pb–Pb Josephson junctions in a scanning tunnelling microscope. Pristine junctions stabilized by a single Pb atom exhibit hysteretic behaviour, confirming the high quality of the junctions, but no asymmetry between the bias directions. Non-reciprocal supercurrents emerge when inserting a single magnetic atom into the junction, with the preferred direction depending on the atomic species. Aided by theoretical modelling, we trace the non-reciprocity to quasiparticle currents flowing by means of electron–hole asymmetric Yu–Shiba–Rusinov states inside the superconducting energy gap and identify a new mechanism for diode behaviour in Josephson junctions. Our results open new avenues for creating atomic-scale Josephson diodes and tuning their properties through single-atom manipulation. |
| نوع الوثيقة: |
redif-article |
| اللغة: |
English |
| DOI: |
10.1038/s41586-023-05743 |
| الإتاحة: |
https://ideas.repec.org/a/nat/nature/v615y2023i7953d10.1038_s41586-023-05743-z.html |
| رقم الأكسشن: |
edsrep.a.nat.nature.v615y2023i7953d10.1038.s41586.023.05743.z |
| قاعدة البيانات: |
RePEc |
