Evidence chain for time-reversal symmetry-breaking kagome superconductivity
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866909459714932736 |
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| author | Deng, Hanbin Liu, Guowei Guguchia, Z. Yang, Tianyu Liu, Jinjin Wang, Zhiwei Xie, Yaofeng Shao, Sen Ma, Haiyang Liège, William Bourdarot, Frédéric Yan, Xiao-Yu Qin, Hailang Mielke III, C. Khasanov, R. Luetkens, H. Wu, Xianxin Chang, Guoqing Liu, Jianpeng Christensen, Morten Holm Kreisel, Andreas Andersen, Brian Møller Huang, Wen Zhao, Yue Bourges, Philippe Yao, Yugui Dai, Pengcheng Yin, Jia-Xin |
| author_facet | Deng, Hanbin Liu, Guowei Guguchia, Z. Yang, Tianyu Liu, Jinjin Wang, Zhiwei Xie, Yaofeng Shao, Sen Ma, Haiyang Liège, William Bourdarot, Frédéric Yan, Xiao-Yu Qin, Hailang Mielke III, C. Khasanov, R. Luetkens, H. Wu, Xianxin Chang, Guoqing Liu, Jianpeng Christensen, Morten Holm Kreisel, Andreas Andersen, Brian Møller Huang, Wen Zhao, Yue Bourges, Philippe Yao, Yugui Dai, Pengcheng Yin, Jia-Xin |
| contents | Superconductivity and magnetism are antagonistic quantum matter, while their intertwining has long been considered in frustrated-lattice systems1-3. In this work, we utilize scanning tunneling microscopy and muon spin resonance to discover time-reversal symmetry-breaking superconductivity in kagome metal Cs(V,Ta)3Sb5, where the Cooper pairing exhibits magnetism and is modulated by it. In the magnetic channel, we observe spontaneous internal magnetism in a full-gap superconducting state. Under perturbations of inverse magnetic fields, we detect a time-reversal asymmetrical interference of Bogoliubov quasi-particles at a circular vector. At this vector, the pairing gap spontaneously modulates, which is distinct from pair density waves occurring at a point vector and consistent with the theoretical proposal of unusual interference effect under time-reversal symmetry-breaking. The correlation between internal magnetism, Bogoliubov quasi-particles, and pairing modulation provides a chain of experimental clues for time-reversal symmetry-breaking kagome superconductivity. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_02898 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Evidence chain for time-reversal symmetry-breaking kagome superconductivity Deng, Hanbin Liu, Guowei Guguchia, Z. Yang, Tianyu Liu, Jinjin Wang, Zhiwei Xie, Yaofeng Shao, Sen Ma, Haiyang Liège, William Bourdarot, Frédéric Yan, Xiao-Yu Qin, Hailang Mielke III, C. Khasanov, R. Luetkens, H. Wu, Xianxin Chang, Guoqing Liu, Jianpeng Christensen, Morten Holm Kreisel, Andreas Andersen, Brian Møller Huang, Wen Zhao, Yue Bourges, Philippe Yao, Yugui Dai, Pengcheng Yin, Jia-Xin Superconductivity Materials Science Superconductivity and magnetism are antagonistic quantum matter, while their intertwining has long been considered in frustrated-lattice systems1-3. In this work, we utilize scanning tunneling microscopy and muon spin resonance to discover time-reversal symmetry-breaking superconductivity in kagome metal Cs(V,Ta)3Sb5, where the Cooper pairing exhibits magnetism and is modulated by it. In the magnetic channel, we observe spontaneous internal magnetism in a full-gap superconducting state. Under perturbations of inverse magnetic fields, we detect a time-reversal asymmetrical interference of Bogoliubov quasi-particles at a circular vector. At this vector, the pairing gap spontaneously modulates, which is distinct from pair density waves occurring at a point vector and consistent with the theoretical proposal of unusual interference effect under time-reversal symmetry-breaking. The correlation between internal magnetism, Bogoliubov quasi-particles, and pairing modulation provides a chain of experimental clues for time-reversal symmetry-breaking kagome superconductivity. |
| title | Evidence chain for time-reversal symmetry-breaking kagome superconductivity |
| topic | Superconductivity Materials Science |
| url | https://arxiv.org/abs/2408.02898 |