Link between supercurrent diode and anomalous Josephson effect revealed by gate-controlled interferometry
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arXiv
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| Autori principali: | , , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2023
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| _version_ | 1866914808573460480 |
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| author | Reinhardt, Simon Ascherl, Tim Costa, Andreas Berger, Johanna Gronin, Sergei Gardner, Geoffrey C. Lindemann, Tyler Manfra, Michael J. Fabian, Jaroslav Kochan, Denis Strunk, Christoph Paradiso, Nicola |
| author_facet | Reinhardt, Simon Ascherl, Tim Costa, Andreas Berger, Johanna Gronin, Sergei Gardner, Geoffrey C. Lindemann, Tyler Manfra, Michael J. Fabian, Jaroslav Kochan, Denis Strunk, Christoph Paradiso, Nicola |
| contents | In Josephson diodes the asymmetry between positive and negative current branch of the current-phase relation leads to a polarity-dependent critical current and Josephson inductance. The supercurrent nonreciprocity can be described as a consequence of the anomalous Josephson effect -- a $φ_0$-shift of the current-phase relation -- in multichannel ballistic junctions with strong spin-orbit interaction. In this work, we simultaneously investigate $φ_0$-shift and supercurrent diode efficiency on the same Josephson junction by means of a superconducting quantum interferometer. By electrostatic gating, we reveal a direct link between $φ_0$-shift and diode effect. Our findings show that the supercurrent diode effect mainly results from magnetochiral anisotropy induced by spin-orbit interaction in combination with a Zeeman field. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2308_01061 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Link between supercurrent diode and anomalous Josephson effect revealed by gate-controlled interferometry Reinhardt, Simon Ascherl, Tim Costa, Andreas Berger, Johanna Gronin, Sergei Gardner, Geoffrey C. Lindemann, Tyler Manfra, Michael J. Fabian, Jaroslav Kochan, Denis Strunk, Christoph Paradiso, Nicola Superconductivity Mesoscale and Nanoscale Physics In Josephson diodes the asymmetry between positive and negative current branch of the current-phase relation leads to a polarity-dependent critical current and Josephson inductance. The supercurrent nonreciprocity can be described as a consequence of the anomalous Josephson effect -- a $φ_0$-shift of the current-phase relation -- in multichannel ballistic junctions with strong spin-orbit interaction. In this work, we simultaneously investigate $φ_0$-shift and supercurrent diode efficiency on the same Josephson junction by means of a superconducting quantum interferometer. By electrostatic gating, we reveal a direct link between $φ_0$-shift and diode effect. Our findings show that the supercurrent diode effect mainly results from magnetochiral anisotropy induced by spin-orbit interaction in combination with a Zeeman field. |
| title | Link between supercurrent diode and anomalous Josephson effect revealed by gate-controlled interferometry |
| topic | Superconductivity Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2308.01061 |