Universal Josephson diode effect
<jats:p> We propose a universal mechanism for the Josephson diode effect in short Josephson junctions. The proposed mechanism is due to finite Cooper pair momentum and is a manifestation of simultaneous breaking of inversion and time-reversal symmetries. The diode efficiency is up...
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| Format: | Article |
| Language: | English |
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American Association for the Advancement of Science (AAAS)
2022
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| Online Access: | https://hdl.handle.net/1721.1/146053 |
| _version_ | 1826206990598144000 |
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| author | Davydova, Margarita Prembabu, Saranesh Fu, Liang |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Davydova, Margarita Prembabu, Saranesh Fu, Liang |
| author_sort | Davydova, Margarita |
| collection | MIT |
| description | <jats:p>
We propose a universal mechanism for the Josephson diode effect in short Josephson junctions. The proposed mechanism is due to finite Cooper pair momentum and is a manifestation of simultaneous breaking of inversion and time-reversal symmetries. The diode efficiency is up to 40%, which corresponds to an asymmetry between the critical currents in opposite directions
<jats:italic>I</jats:italic>
<jats:sub>c+</jats:sub>
/
<jats:italic>I</jats:italic>
<jats:sub>c−</jats:sub>
≈ 230%. We show that this arises from both the Doppler shift of the Andreev bound state energies and the phase-independent asymmetric current from the continuum. Last, we propose a simple scheme for achieving finite-momentum pairing, which does not rely on spin-orbit coupling and thus greatly expands existing platforms for the observation of supercurrent diode effects.
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| first_indexed | 2024-09-23T13:41:46Z |
| format | Article |
| id | mit-1721.1/146053 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T13:41:46Z |
| publishDate | 2022 |
| publisher | American Association for the Advancement of Science (AAAS) |
| record_format | dspace |
| spelling | mit-1721.1/1460532023-02-15T21:10:59Z Universal Josephson diode effect Davydova, Margarita Prembabu, Saranesh Fu, Liang Massachusetts Institute of Technology. Department of Physics <jats:p> We propose a universal mechanism for the Josephson diode effect in short Josephson junctions. The proposed mechanism is due to finite Cooper pair momentum and is a manifestation of simultaneous breaking of inversion and time-reversal symmetries. The diode efficiency is up to 40%, which corresponds to an asymmetry between the critical currents in opposite directions <jats:italic>I</jats:italic> <jats:sub>c+</jats:sub> / <jats:italic>I</jats:italic> <jats:sub>c−</jats:sub> ≈ 230%. We show that this arises from both the Doppler shift of the Andreev bound state energies and the phase-independent asymmetric current from the continuum. Last, we propose a simple scheme for achieving finite-momentum pairing, which does not rely on spin-orbit coupling and thus greatly expands existing platforms for the observation of supercurrent diode effects. </jats:p> 2022-10-31T14:09:41Z 2022-10-31T14:09:41Z 2022 2022-10-31T13:57:26Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/146053 Davydova, Margarita, Prembabu, Saranesh and Fu, Liang. 2022. "Universal Josephson diode effect." Science Advances, 8 (23). en 10.1126/SCIADV.ABO0309 Science Advances Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/ application/pdf American Association for the Advancement of Science (AAAS) Science Advances |
| spellingShingle | Davydova, Margarita Prembabu, Saranesh Fu, Liang Universal Josephson diode effect |
| title | Universal Josephson diode effect |
| title_full | Universal Josephson diode effect |
| title_fullStr | Universal Josephson diode effect |
| title_full_unstemmed | Universal Josephson diode effect |
| title_short | Universal Josephson diode effect |
| title_sort | universal josephson diode effect |
| url | https://hdl.handle.net/1721.1/146053 |
| work_keys_str_mv | AT davydovamargarita universaljosephsondiodeeffect AT prembabusaranesh universaljosephsondiodeeffect AT fuliang universaljosephsondiodeeffect |