Measurements of Phase Dynamics in Planar Josephson Junctions and SQUIDs
| العنوان: | Measurements of Phase Dynamics in Planar Josephson Junctions and SQUIDs |
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| المؤلفون: | D. Z. Haxell, E. Cheah, F. Křížek, R. Schott, M. F. Ritter, M. Hinderling, W. Belzig, C. Bruder, W. Wegscheider, H. Riel, F. Nichele |
| المصدر: | Physical Review Letters, 130 (8) |
| بيانات النشر: | American Physical Society (APS), 2023. |
| سنة النشر: | 2023 |
| مصطلحات موضوعية: | Critical current, Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Superconductivity, superconductivity, FOS: Physical sciences, General Physics and Astronomy, Superconductivity (cond-mat.supr-con), quantum, Phase slips, Andreev reflection, Condensed Matter::Superconductivity, Josephson junction, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), ddc:530, Two-dimensional electron system |
| الوصف: | We experimentally investigate the stochastic phase dynamics of planar Josephson junctions (JJs) and superconducting quantum interference devices (SQUIDs) defined in epitaxial InAs/Al heterostructures, and characterized by a large ratio of Josephson energy to charging energy. We observe a crossover from a regime of macroscopic quantum tunneling to one of phase diffusion as a function of temperature, where the transition temperature T∗ is gate-tunable. The switching probability distributions are shown to be consistent with a small shunt capacitance and moderate damping, resulting in a switching current which is a small fraction of the critical current. Phase locking between two JJs leads to a difference in switching current between that of a JJ measured in isolation and that of the same JJ measured in an asymmetric SQUID loop. In the case of the loop, T∗ is also tuned by a magnetic flux. Physical Review Letters, 130 (8) ISSN:0031-9007 ISSN:1079-7114 |
| وصف الملف: | application/application/pdf; application/pdf |
| تدمد: | 1079-7114 0031-9007 |
| DOI: | 10.1103/physrevlett.130.087002 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::94c99f6bccdff930c67665fab941791b https://doi.org/10.1103/physrevlett.130.087002 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....94c99f6bccdff930c67665fab941791b |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 10797114 00319007 |
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| DOI: | 10.1103/physrevlett.130.087002 |