Dzyaloshinskii-Moriya-type spin-spin interaction from mixed-parity superconductivity
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866916881053515776 |
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| author | Ouassou, Jabir Ali Yokoyama, Takehito Linder, Jacob |
| author_facet | Ouassou, Jabir Ali Yokoyama, Takehito Linder, Jacob |
| contents | Interacting impurity spins adsorbed on surfaces have been suggested as basic components for applications in quantum computation and spintronics. Such spins usually prefer a parallel or antiparallel configuration, but weakly non-collinear alignments are possible due to the Dzyaloshinskii-Moriya interaction (DMI) that arises in the presence of relativistic spin-orbit coupling. Here, we show that an effective Dzyaloshinskii-Moriya-type interaction (DMTI) can emerge purely from superconducting correlations without any spin-orbit interaction. We give an analytical proof and provide a numerical study which shows that DMTI arises in mixed-parity superconductors solely from the superconducting pairing. Moreover, we show that the same effect can be realized in Josephson junctions between s-wave and p-wave superconductors, where a phase bias toggles the DMTI entirely on and off. These results enable a way to engineer spin textures using superconducting order. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2407_07144 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Dzyaloshinskii-Moriya-type spin-spin interaction from mixed-parity superconductivity Ouassou, Jabir Ali Yokoyama, Takehito Linder, Jacob Superconductivity Mesoscale and Nanoscale Physics Interacting impurity spins adsorbed on surfaces have been suggested as basic components for applications in quantum computation and spintronics. Such spins usually prefer a parallel or antiparallel configuration, but weakly non-collinear alignments are possible due to the Dzyaloshinskii-Moriya interaction (DMI) that arises in the presence of relativistic spin-orbit coupling. Here, we show that an effective Dzyaloshinskii-Moriya-type interaction (DMTI) can emerge purely from superconducting correlations without any spin-orbit interaction. We give an analytical proof and provide a numerical study which shows that DMTI arises in mixed-parity superconductors solely from the superconducting pairing. Moreover, we show that the same effect can be realized in Josephson junctions between s-wave and p-wave superconductors, where a phase bias toggles the DMTI entirely on and off. These results enable a way to engineer spin textures using superconducting order. |
| title | Dzyaloshinskii-Moriya-type spin-spin interaction from mixed-parity superconductivity |
| topic | Superconductivity Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2407.07144 |