تقرير
Josephson inductance as a probe for highly ballistic semiconductor-superconductor weak links
| العنوان: | Josephson inductance as a probe for highly ballistic semiconductor-superconductor weak links |
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| المؤلفون: | Baumgartner, Christian, Fuchs, Lorenz, Frész, Linus, Reinhardt, Simon, Gronin, Sergei, Gardner, Geoffrey C., Manfra, Michael J., Paradiso, Nicola, Strunk, Christoph |
| المصدر: | Phys. Rev. Lett. 126, 037001 (2021) |
| سنة النشر: | 2020 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Superconductivity |
| الوصف: | We present simultaneous measurements of Josephson inductance and DC transport characteristics of ballistic Josephson junctions based upon an epitaxial Al-InAs heterostructure. The Josephson inductance at finite current bias directly reveals the current-phase relation. The proximity-induced gap, the critical current and the average value of the transparency $\bar{\tau}$ are extracted without need for phase bias, demonstrating, e.g.,~a near-unity value of $\bar{\tau}=0.94$. Our method allows us to probe the devices deeply in the non-dissipative regime, where ordinary transport measurements are featureless. In perpendicular magnetic field the junctions show a nearly perfect Fraunhofer pattern of the critical current, which is insensitive to the value of $\bar{\tau}$. In contrast, the signature of supercurrent interference in the inductance turns out to be extremely sensitive to $\bar{\tau}$. Comment: 13 pages, 13 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevLett.126.037001 |
| URL الوصول: | http://arxiv.org/abs/2007.08371 |
| رقم الأكسشن: | edsarx.2007.08371 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevLett.126.037001 |
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