تقرير
High-temperature Josephson diode
| العنوان: | High-temperature Josephson diode |
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| المؤلفون: | Ghosh, Sanat, Patil, Vilas, Basu, Amit, Kuldeep, Dutta, Achintya, Jangade, Digambar A., Kulkarni, Ruta, Thamizhavel, A., Steiner, Jacob F., von Oppen, Felix, Deshmukh, Mandar M. |
| المصدر: | Nature Materials (2024) |
| سنة النشر: | 2022 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Superconductivity, Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Materials Science, Condensed Matter - Strongly Correlated Electrons |
| الوصف: | Symmetry plays a critical role in determining various properties of a material. Semiconducting p-n junction diode exemplifies the engineered skew electronic response and is at the heart of contemporary electronic circuits. The non-reciprocal charge transport in a diode arises from doping-induced breaking of inversion symmetry. Breaking of time-reversal, in addition to inversion symmetry in some superconducting systems, leads to an analogous device - the superconducting diode. Following the pioneering first demonstration of the superconducting diode effect (SDE), a plethora of new systems showing similar effects have been reported. SDE lays the foundation for realizing ultra-low dissipative circuits, while Josephson phenomena-based diode effect (JDE) can enable realization of protected qubits. However, SDE and JDE reported thus far are at low temperatures ($\sim$ 4 K or lower) and impede their adaptation to technological applications. Here we demonstrate a Josephson diode working up to 77 K using an artificial Josephson junction (AJJ) of twisted layers of Bi$_2$Sr$_2$CaCu$_2$O$_{8+\delta}$ (BSCCO). The non-reciprocal response manifests as an asymmetry in the magnitude of switching currents and their distributions and appears for all twist angles. The asymmetry is induced by and tunable with a very small magnetic field applied perpendicular to the junction. We report a record asymmetry of 60 % at 20 K. We explain our results within a vortex-based scenario. Our results provide a path toward realizing superconducting quantum circuits at liquid nitrogen temperature. Comment: 46 pages, 25 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1038/s41563-024-01804-4 |
| URL الوصول: | http://arxiv.org/abs/2210.11256 |
| رقم الأكسشن: | edsarx.2210.11256 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1038/s41563-024-01804-4 |
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