Diode effect in a skyrmion-coupled high-temperature Josephson junction
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866909882172571648 |
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| author | Singh, Digvijay Sharma, Pankaj Mohanta, Narayan |
| author_facet | Singh, Digvijay Sharma, Pankaj Mohanta, Narayan |
| contents | We show that a planar Josephson junction having $d$-wave superconducting regions, with a skyrmion crystal placed underneath, produces a robust gate-tunable superconducting diode effect. The spatially-varying exchange field of the skyrmion crystal breaks both inversion and time-reversal symmetries, leading to an asymmetric current-phase relation with an anomalous phase shift. Our theoretical calculations, obtained using resistively and capacitively shunted junction model combined with Bogoliubov-de Gennes method, reveal that the diode efficiency is largely tunable by controlling external gate voltage and skyrmion radius. Incorporation of a $d$-wave superconductor such as high-$T_c$ Cuprate enables the diode to function at higher operating temperatures. Our results establish a unique and practically-realizable mechanism for devising tunable field-free superconducting diodes based on magnetic texture-superconductor hybrid platforms. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_00656 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Diode effect in a skyrmion-coupled high-temperature Josephson junction Singh, Digvijay Sharma, Pankaj Mohanta, Narayan Superconductivity We show that a planar Josephson junction having $d$-wave superconducting regions, with a skyrmion crystal placed underneath, produces a robust gate-tunable superconducting diode effect. The spatially-varying exchange field of the skyrmion crystal breaks both inversion and time-reversal symmetries, leading to an asymmetric current-phase relation with an anomalous phase shift. Our theoretical calculations, obtained using resistively and capacitively shunted junction model combined with Bogoliubov-de Gennes method, reveal that the diode efficiency is largely tunable by controlling external gate voltage and skyrmion radius. Incorporation of a $d$-wave superconductor such as high-$T_c$ Cuprate enables the diode to function at higher operating temperatures. Our results establish a unique and practically-realizable mechanism for devising tunable field-free superconducting diodes based on magnetic texture-superconductor hybrid platforms. |
| title | Diode effect in a skyrmion-coupled high-temperature Josephson junction |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2511.00656 |