$φ$ Josephson junction induced by altermagnetism
Fuente:
arXiv
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| Autori principali: | , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| Soggetti: | |
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| _version_ | 1866910719346212864 |
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| author | Lu, Bo Maeda, Kazuki Ito, Hiroyuki Yada, Keiji Tanaka, Yukio |
| author_facet | Lu, Bo Maeda, Kazuki Ito, Hiroyuki Yada, Keiji Tanaka, Yukio |
| contents | We study the Josephson effect in a superconductor/altermagnet/superconductor (S/AM/S) junction. We find anomalous phenomena including $0$-$π$ transition as well as multi-nodal current-phase relations. Similar to $d$-wave superconductor, $d$-wave altermagnet can support $φ$ junction where free energy minima locate neither $φ=0$ nor $\pm π$ with double degeneracy. These properties can be tunable by parameters, e.g., the exchange energy, the orientation of crystal axis, the length, and the chemical doping of altermagnet. These rich features lead to accessible functionality of S/AM/S junction. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_10656 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | $φ$ Josephson junction induced by altermagnetism Lu, Bo Maeda, Kazuki Ito, Hiroyuki Yada, Keiji Tanaka, Yukio Superconductivity Mesoscale and Nanoscale Physics We study the Josephson effect in a superconductor/altermagnet/superconductor (S/AM/S) junction. We find anomalous phenomena including $0$-$π$ transition as well as multi-nodal current-phase relations. Similar to $d$-wave superconductor, $d$-wave altermagnet can support $φ$ junction where free energy minima locate neither $φ=0$ nor $\pm π$ with double degeneracy. These properties can be tunable by parameters, e.g., the exchange energy, the orientation of crystal axis, the length, and the chemical doping of altermagnet. These rich features lead to accessible functionality of S/AM/S junction. |
| title | $φ$ Josephson junction induced by altermagnetism |
| topic | Superconductivity Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2405.10656 |