Thermoelectric AC Josephson effect
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arXiv
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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866912305961238528 |
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| author | Mansikkamäki, Olli Giazotto, Francesco Balatsky, Alexander |
| author_facet | Mansikkamäki, Olli Giazotto, Francesco Balatsky, Alexander |
| contents | A temperature gradient $ΔT$ across a Josephson junction induces a thermoelectric current. We predict the AC Josephson effect is activated when this current surpasses the junction's critical current. Our investigation of this phenomenon employs the time-dependent Ginzburg-Landau theory framework in proximity to the critical temperature. Our results indicate that the frequency of the AC current is approximately given by $π S Δ T / (2 Φ_0)$, where $S$ represents the Seebeck coefficient and $Φ_0$ the magnetic flux quantum and we estimate the frequency be on the range of GHz for Sn up to a THz for larger $S$ and $T_c$ materials. Furthermore, we propose two distinct experimental configurations to observe this effect. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_01884 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Thermoelectric AC Josephson effect Mansikkamäki, Olli Giazotto, Francesco Balatsky, Alexander Superconductivity A temperature gradient $ΔT$ across a Josephson junction induces a thermoelectric current. We predict the AC Josephson effect is activated when this current surpasses the junction's critical current. Our investigation of this phenomenon employs the time-dependent Ginzburg-Landau theory framework in proximity to the critical temperature. Our results indicate that the frequency of the AC current is approximately given by $π S Δ T / (2 Φ_0)$, where $S$ represents the Seebeck coefficient and $Φ_0$ the magnetic flux quantum and we estimate the frequency be on the range of GHz for Sn up to a THz for larger $S$ and $T_c$ materials. Furthermore, we propose two distinct experimental configurations to observe this effect. |
| title | Thermoelectric AC Josephson effect |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2504.01884 |