Diode effects in current-biased Josephson junctions
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arXiv
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| Hauptverfasser: | , , , , |
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| Format: | Preprint |
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2022
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| _version_ | 1866917562937245696 |
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| author | Steiner, Jacob F. Melischek, Larissa Trahms, Martina Franke, Katharina J. von Oppen, Felix |
| author_facet | Steiner, Jacob F. Melischek, Larissa Trahms, Martina Franke, Katharina J. von Oppen, Felix |
| contents | Current-biased Josephson junctions exhibit hysteretic transitions between dissipative and superconducting states as characterized by switching and retrapping currents. Here, we develop a theory for diode-like effects in the switching and retrapping currents of weakly-damped Josephson junctions. We find that while the diode-like behavior of switching currents is rooted in asymmetric current-phase relations, nonreciprocal retrapping currents originate in asymmetric quasiparticle currents. These different origins also imply distinctly different symmetry requirements. We illustrate our results by a microscopic model for junctions involving a single magnetic atom. Our theory provides significant guidance in identifying the microscopic origin of nonreciprocities in Josephson junctions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2212_06866 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Diode effects in current-biased Josephson junctions Steiner, Jacob F. Melischek, Larissa Trahms, Martina Franke, Katharina J. von Oppen, Felix Superconductivity Mesoscale and Nanoscale Physics Current-biased Josephson junctions exhibit hysteretic transitions between dissipative and superconducting states as characterized by switching and retrapping currents. Here, we develop a theory for diode-like effects in the switching and retrapping currents of weakly-damped Josephson junctions. We find that while the diode-like behavior of switching currents is rooted in asymmetric current-phase relations, nonreciprocal retrapping currents originate in asymmetric quasiparticle currents. These different origins also imply distinctly different symmetry requirements. We illustrate our results by a microscopic model for junctions involving a single magnetic atom. Our theory provides significant guidance in identifying the microscopic origin of nonreciprocities in Josephson junctions. |
| title | Diode effects in current-biased Josephson junctions |
| topic | Superconductivity Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2212.06866 |