Superconducting diode effect in Ising superconductors
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866913833419800576 |
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| author | Bankier, Itai Attias, Lotan Levchenko, Alex Khodas, Maxim |
| author_facet | Bankier, Itai Attias, Lotan Levchenko, Alex Khodas, Maxim |
| contents | We study the superconducting diode effect (SDE) in an Ising superconductor with broken basal mirror symmetry in a parallel magnetic field. We show that in the presence of a small Rashba spin splitting, $Δ_R$, the dominant Ising spin-orbit coupling ($Δ_I >> Δ_R$) dramatically enhances the SDE efficiency compared to a Rashba superconductor with $Δ_I = 0$ and the same $Δ_R$. The suppression of the SDE for $Δ_I = 0$ at $Δ_R$ much larger than the critical temperature ($T_c$) is accidental. At $Δ_R << T_c$, the SDE efficiency is small because, to linear order, $Δ_R$ can be removed by a gauge transformation. These two factors -- the accidental suppression of the SDE at large $Δ_R$ and the systematic suppression at small $Δ_R$ -- are eliminated by Ising spin-orbit coupling. As a result, SDE efficiency is substantially enhanced for $Δ_I >> Δ_R \neq 0$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_15115 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Superconducting diode effect in Ising superconductors Bankier, Itai Attias, Lotan Levchenko, Alex Khodas, Maxim Superconductivity We study the superconducting diode effect (SDE) in an Ising superconductor with broken basal mirror symmetry in a parallel magnetic field. We show that in the presence of a small Rashba spin splitting, $Δ_R$, the dominant Ising spin-orbit coupling ($Δ_I >> Δ_R$) dramatically enhances the SDE efficiency compared to a Rashba superconductor with $Δ_I = 0$ and the same $Δ_R$. The suppression of the SDE for $Δ_I = 0$ at $Δ_R$ much larger than the critical temperature ($T_c$) is accidental. At $Δ_R << T_c$, the SDE efficiency is small because, to linear order, $Δ_R$ can be removed by a gauge transformation. These two factors -- the accidental suppression of the SDE at large $Δ_R$ and the systematic suppression at small $Δ_R$ -- are eliminated by Ising spin-orbit coupling. As a result, SDE efficiency is substantially enhanced for $Δ_I >> Δ_R \neq 0$. |
| title | Superconducting diode effect in Ising superconductors |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2503.15115 |