A Hierarchy of Superconductivity and Topological Charge Density Wave States in Rhombohedral Graphene
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arXiv
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| Main Authors: | , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866908536876826624 |
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| author | Nguyen, Ron Q. Wu, Hai-Tian Morissette, Erin Zhang, Naiyuan J. Qin, Peiyu Watanabe, Kenji Taniguchi, Takashi Hui, Aaron W. Feldman, Dima E. Li, J. I. A. |
| author_facet | Nguyen, Ron Q. Wu, Hai-Tian Morissette, Erin Zhang, Naiyuan J. Qin, Peiyu Watanabe, Kenji Taniguchi, Takashi Hui, Aaron W. Feldman, Dima E. Li, J. I. A. |
| contents | Superconductivity and the quantum Hall effect are conventionally regarded as mutually exclusive: superconductivity is suppressed by magnetic fields, whereas the quantum Hall effect relies on them. Here we report a striking exception, where an unconventional superconducting phase is stabilized by an out-of-plane magnetic field and coexists with a re-entrant integer quantum Hall (RIQH) effect in moiré-less rhombohedral hexalayer graphene. The re-entrant quantum Hall state, arising from a bubble-like charge density wave (CDW), provides a natural backdrop for the emergence of superconductivity. Angle-resolved transport reveals that the field-stabilized superconducting phase occupies the same density--displacement-field regime as a stripe-ordered phase at zero field, yet only develops once the stripe is replaced by a bubble-like CDW at finite field. These findings demonstrate a decisive role of CDW order in stabilizing superconductivity in rhombohedral graphene, establishing a new paradigm for the interplay between superconductivity and quantum Hall physics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_22026 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | A Hierarchy of Superconductivity and Topological Charge Density Wave States in Rhombohedral Graphene Nguyen, Ron Q. Wu, Hai-Tian Morissette, Erin Zhang, Naiyuan J. Qin, Peiyu Watanabe, Kenji Taniguchi, Takashi Hui, Aaron W. Feldman, Dima E. Li, J. I. A. Mesoscale and Nanoscale Physics Strongly Correlated Electrons Superconductivity Superconductivity and the quantum Hall effect are conventionally regarded as mutually exclusive: superconductivity is suppressed by magnetic fields, whereas the quantum Hall effect relies on them. Here we report a striking exception, where an unconventional superconducting phase is stabilized by an out-of-plane magnetic field and coexists with a re-entrant integer quantum Hall (RIQH) effect in moiré-less rhombohedral hexalayer graphene. The re-entrant quantum Hall state, arising from a bubble-like charge density wave (CDW), provides a natural backdrop for the emergence of superconductivity. Angle-resolved transport reveals that the field-stabilized superconducting phase occupies the same density--displacement-field regime as a stripe-ordered phase at zero field, yet only develops once the stripe is replaced by a bubble-like CDW at finite field. These findings demonstrate a decisive role of CDW order in stabilizing superconductivity in rhombohedral graphene, establishing a new paradigm for the interplay between superconductivity and quantum Hall physics. |
| title | A Hierarchy of Superconductivity and Topological Charge Density Wave States in Rhombohedral Graphene |
| topic | Mesoscale and Nanoscale Physics Strongly Correlated Electrons Superconductivity |
| url | https://arxiv.org/abs/2507.22026 |