Superconducting Arcs
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arXiv
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| Autori principali: | , , , , , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2023
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| _version_ | 1866909135841263616 |
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| author | Kuibarov, Andrii Suvorov, Oleksandr Vocaturo, Riccardo Fedorov, Alexander Lou, Rui Merkwitz, Luise Voroshnin, Vladimir Facio, Jorge I. Koepernik, Klaus Yaresko, Alexander Shipunov, Grigoriy Aswartham, Saicharan Brink, Jeroen van den Büchner, Bernd Borisenko, Sergey |
| author_facet | Kuibarov, Andrii Suvorov, Oleksandr Vocaturo, Riccardo Fedorov, Alexander Lou, Rui Merkwitz, Luise Voroshnin, Vladimir Facio, Jorge I. Koepernik, Klaus Yaresko, Alexander Shipunov, Grigoriy Aswartham, Saicharan Brink, Jeroen van den Büchner, Bernd Borisenko, Sergey |
| contents | An essential ingredient for the production of Majorana fermions that can be used for quantum computing is the presence of topological superconductivity. As bulk topological superconductors remain elusive, the most promising approaches exploit proximity-induced superconductivity making systems fragile and difficult to realize. Weyl semimetals due to their intrinsic topology belong to potential candidates too, but search for Majorana fermions has always been connected with the superconductivity in the bulk, leaving the possibility of intrinsic superconductivity of the Fermi surface arcs themselves practically without attention, even from the theory side.Here, by means of angle-resolved photoemission spectroscopy and ab-initio calculations, we unambiguously identify topological Fermi arcs on two opposing surfaces of the non-centrosymmetric Weyl material PtBi2. We show that these states become superconducting at different temperatures around 10K. Remarkably, the corresponding coherencepeaks appear as the strongest and sharpest excitations ever detected by photoemission from solids, suggesting significant technological relevance. Our findings indicate that topological superconductivity in PtBi2 occurs exclusively at the surface, which not only makes it an ideal platform to host Majorana fermions, but may also lead to a unique quantum phase - an intrinsic topological SNS Josephson junction. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2305_02900 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Superconducting Arcs Kuibarov, Andrii Suvorov, Oleksandr Vocaturo, Riccardo Fedorov, Alexander Lou, Rui Merkwitz, Luise Voroshnin, Vladimir Facio, Jorge I. Koepernik, Klaus Yaresko, Alexander Shipunov, Grigoriy Aswartham, Saicharan Brink, Jeroen van den Büchner, Bernd Borisenko, Sergey Superconductivity Mesoscale and Nanoscale Physics Materials Science An essential ingredient for the production of Majorana fermions that can be used for quantum computing is the presence of topological superconductivity. As bulk topological superconductors remain elusive, the most promising approaches exploit proximity-induced superconductivity making systems fragile and difficult to realize. Weyl semimetals due to their intrinsic topology belong to potential candidates too, but search for Majorana fermions has always been connected with the superconductivity in the bulk, leaving the possibility of intrinsic superconductivity of the Fermi surface arcs themselves practically without attention, even from the theory side.Here, by means of angle-resolved photoemission spectroscopy and ab-initio calculations, we unambiguously identify topological Fermi arcs on two opposing surfaces of the non-centrosymmetric Weyl material PtBi2. We show that these states become superconducting at different temperatures around 10K. Remarkably, the corresponding coherencepeaks appear as the strongest and sharpest excitations ever detected by photoemission from solids, suggesting significant technological relevance. Our findings indicate that topological superconductivity in PtBi2 occurs exclusively at the surface, which not only makes it an ideal platform to host Majorana fermions, but may also lead to a unique quantum phase - an intrinsic topological SNS Josephson junction. |
| title | Superconducting Arcs |
| topic | Superconductivity Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2305.02900 |