Impact of Spin-Orbit Coupling on Superconductivity in Rhombohedral Graphene
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arXiv
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| Auteurs principaux: | , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866909471679184896 |
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| author | Yang, Jixiang Shi, Xiaoyan Ye, Shenyong Yoon, Chiho Lu, Zhengguang Kakani, Vivek Han, Tonghang Seo, Junseok Shi, Lihan Watanabe, Kenji Taniguchi, Takashi Zhang, Fan Ju, Long |
| author_facet | Yang, Jixiang Shi, Xiaoyan Ye, Shenyong Yoon, Chiho Lu, Zhengguang Kakani, Vivek Han, Tonghang Seo, Junseok Shi, Lihan Watanabe, Kenji Taniguchi, Takashi Zhang, Fan Ju, Long |
| contents | Spin-orbit coupling (SOC) has played an important role in many topological and correlated electron materials. In graphene-based systems, SOC induced by transition metal dichalcogenide (TMD) at proximity was shown to drive topological states and strengthen superconductivity. However, in rhombohedral multilayer graphene, a robust platform for electron correlation and topology, superconductivity and the role of SOC remain largely unexplored. Here we report transport measurements of TMD-proximitized rhombohedral trilayer graphene (RTG). We observed a new hole-doped superconducting state SC4 with Tc = 230 mK. On the electron-doped side, we identified a new isospin-symmetry breaking three-quarter-metal (TQM) phase and observed the nearby weak superconducting state SC3 is significantly enhanced. Surprisingly, the original superconducting state SC1 in bare RTG is strongly suppressed in the presence of TMD - opposite to the effect of SOC on all other graphene superconductivities. Our observations form the basis of exploring superconductivity and non-Abelian quasiparticles in rhombohedral graphene devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_09906 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Impact of Spin-Orbit Coupling on Superconductivity in Rhombohedral Graphene Yang, Jixiang Shi, Xiaoyan Ye, Shenyong Yoon, Chiho Lu, Zhengguang Kakani, Vivek Han, Tonghang Seo, Junseok Shi, Lihan Watanabe, Kenji Taniguchi, Takashi Zhang, Fan Ju, Long Superconductivity Strongly Correlated Electrons Spin-orbit coupling (SOC) has played an important role in many topological and correlated electron materials. In graphene-based systems, SOC induced by transition metal dichalcogenide (TMD) at proximity was shown to drive topological states and strengthen superconductivity. However, in rhombohedral multilayer graphene, a robust platform for electron correlation and topology, superconductivity and the role of SOC remain largely unexplored. Here we report transport measurements of TMD-proximitized rhombohedral trilayer graphene (RTG). We observed a new hole-doped superconducting state SC4 with Tc = 230 mK. On the electron-doped side, we identified a new isospin-symmetry breaking three-quarter-metal (TQM) phase and observed the nearby weak superconducting state SC3 is significantly enhanced. Surprisingly, the original superconducting state SC1 in bare RTG is strongly suppressed in the presence of TMD - opposite to the effect of SOC on all other graphene superconductivities. Our observations form the basis of exploring superconductivity and non-Abelian quasiparticles in rhombohedral graphene devices. |
| title | Impact of Spin-Orbit Coupling on Superconductivity in Rhombohedral Graphene |
| topic | Superconductivity Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2408.09906 |