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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2022
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2205.10062 |
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| _version_ | 1866908312112463872 |
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| author | Beck, Philip Schneider, Lucas Wiesendanger, Roland Wiebe, Jens |
| author_facet | Beck, Philip Schneider, Lucas Wiesendanger, Roland Wiebe, Jens |
| contents | Realizing Majorana bound states in chains of magnetic impurities on $s$-wave superconducting substrates relies on a fine tuning of the energy and hybridization of the single magnetic impurity bound states and of the spin-orbit coupling (SOC). While recent experiments investigate the influence of the former two parameters, the effect of SOC remained experimentally largely unexplored. Here, we present a scanning tunneling spectroscopy study of close-packed Mn chains along the [001]-direction on Ta(110) which has almost identical atomic and surface electronic structure compared to the previously studied Nb(110) system, but a three times larger SOC. The dominant Shiba band has a very similar dispersion, but its minigap, taken relative to $\varDelta$, is increased by a factor of 1.9 with respect to the Nb case, which can be ascribed to the stronger SOC. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2205_10062 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Effect of substrate spin-orbit coupling on the topological gap size of Shiba chains Beck, Philip Schneider, Lucas Wiesendanger, Roland Wiebe, Jens Superconductivity Realizing Majorana bound states in chains of magnetic impurities on $s$-wave superconducting substrates relies on a fine tuning of the energy and hybridization of the single magnetic impurity bound states and of the spin-orbit coupling (SOC). While recent experiments investigate the influence of the former two parameters, the effect of SOC remained experimentally largely unexplored. Here, we present a scanning tunneling spectroscopy study of close-packed Mn chains along the [001]-direction on Ta(110) which has almost identical atomic and surface electronic structure compared to the previously studied Nb(110) system, but a three times larger SOC. The dominant Shiba band has a very similar dispersion, but its minigap, taken relative to $\varDelta$, is increased by a factor of 1.9 with respect to the Nb case, which can be ascribed to the stronger SOC. |
| title | Effect of substrate spin-orbit coupling on the topological gap size of Shiba chains |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2205.10062 |