{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,15]],"date-time":"2025-10-15T10:37:35Z","timestamp":1760524655568,"version":"build-2065373602"},"reference-count":53,"publisher":"MDPI AG","issue":"18","license":[{"start":{"date-parts":[[2024,9,13]],"date-time":"2024-09-13T00:00:00Z","timestamp":1726185600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["12264037","2021KCXTD040","2023KTSCX174","2023KSYS011","2023B2035"],"award-info":[{"award-number":["12264037","2021KCXTD040","2023KTSCX174","2023KSYS011","2023B2035"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Innovation Team of Colleges and Universities in Guangdong Province","award":["12264037","2021KCXTD040","2023KTSCX174","2023KSYS011","2023B2035"],"award-info":[{"award-number":["12264037","2021KCXTD040","2023KTSCX174","2023KSYS011","2023B2035"]}]},{"name":"Guangdong Province Education Department","award":["12264037","2021KCXTD040","2023KTSCX174","2023KSYS011","2023B2035"],"award-info":[{"award-number":["12264037","2021KCXTD040","2023KTSCX174","2023KSYS011","2023B2035"]}]},{"name":"Key Laboratory of Guangdong Higher Education Institutes","award":["12264037","2021KCXTD040","2023KTSCX174","2023KSYS011","2023B2035"],"award-info":[{"award-number":["12264037","2021KCXTD040","2023KTSCX174","2023KSYS011","2023B2035"]}]},{"name":"Science and Technology Bureau of Zhongshan","award":["12264037","2021KCXTD040","2023KTSCX174","2023KSYS011","2023B2035"],"award-info":[{"award-number":["12264037","2021KCXTD040","2023KTSCX174","2023KSYS011","2023B2035"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>We study theoretically the supercurrent and the superconducting diode effect (SDE) in a structure comprising parallel-coupled double quantum dots (DQDs) sandwiched between two superconductor leads in the presence of a magnetic flux. The influence of the Rashba spin\u2013orbit interaction (RSOI), which induces a spin-dependent phase factor in the dot\u2013superconductor coupling strength, is taken into account by adopting the nonequilibrium Green\u2019s function technique. This RSOI-induced phase factor serves as a driving force for the supercurrent in addition to the usual superconducting phase difference, and it leads to the system\u2019s left\/right asymmetry. Correspondingly, the magnitude of the positive and negative critical currents become different from each other: the so-called SDE. Our results show that the period, magnitude, and direction of the supercurrents depend strongly on the RSOI-induced phase factor, dots\u2019 energy levels, interdot coupling strengths, and the magnetic flux. In the absence of magnetic flux, the diode efficiency is negative and may approach \u22122, which indicates the perfect diode effect with only negative flowing supercurrent in the absence of a positive one. Interestingly enough, both the sign and magnitude of the diode efficiency can be efficiently adjusted with the help of magnetic flux, the dots\u2019 energy levels and the interdot coupling strength and thus provide a controllable SDE by rich means, such as gate voltage or host materials of the system.<\/jats:p>","DOI":"10.3390\/ma17184497","type":"journal-article","created":{"date-parts":[[2024,9,13]],"date-time":"2024-09-13T05:31:44Z","timestamp":1726205504000},"page":"4497","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Supercurrent and Superconducting Diode Effect in Parallel Double Quantum Dots with Rashba Spin\u2013Orbit Interaction"],"prefix":"10.3390","volume":"17","author":[{"given":"Feng","family":"Chi","sequence":"first","affiliation":[{"name":"School of Electronic and Information Engineering, UEST of China, Zhongshan Institute, Zhongshan 528400, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yaohong","family":"Shen","sequence":"additional","affiliation":[{"name":"South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yumei","family":"Gao","sequence":"additional","affiliation":[{"name":"School of Electronic and Information Engineering, UEST of China, Zhongshan Institute, Zhongshan 528400, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jia","family":"Liu","sequence":"additional","affiliation":[{"name":"School of Science, Inner Mongolia University of Science and Technology, Baotou 014010, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2448-5562","authenticated-orcid":false,"given":"Zhenguo","family":"Fu","sequence":"additional","affiliation":[{"name":"Institute of Applied Physics and Computational Mathematics, Beijing 100088, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7670-7916","authenticated-orcid":false,"given":"Zichuan","family":"Yi","sequence":"additional","affiliation":[{"name":"School of Electronic and Information Engineering, UEST of China, Zhongshan Institute, Zhongshan 528400, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Liming","family":"Liu","sequence":"additional","affiliation":[{"name":"School of Electronic and Information Engineering, UEST of China, Zhongshan Institute, Zhongshan 528400, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2024,9,13]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"251","DOI":"10.1016\/0031-9163(62)91369-0","article-title":"Possible new effects in superconductive tunnelling","volume":"1","author":"Josephson","year":"1962","journal-title":"Phys. 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B"}],"container-title":["Materials"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1996-1944\/17\/18\/4497\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T15:55:30Z","timestamp":1760111730000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1996-1944\/17\/18\/4497"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2024,9,13]]},"references-count":53,"journal-issue":{"issue":"18","published-online":{"date-parts":[[2024,9]]}},"alternative-id":["ma17184497"],"URL":"https:\/\/doi.org\/10.3390\/ma17184497","relation":{},"ISSN":["1996-1944"],"issn-type":[{"type":"electronic","value":"1996-1944"}],"subject":[],"published":{"date-parts":[[2024,9,13]]}}}