Van-Hove annihilation and nematic instability on a Kagome lattice
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arXiv
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866911960309694464 |
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| author | Jiang, Yu-Xiao Shao, Sen Xia, Wei Denner, M. Michael Ingham, Julian Hossain, Md Shafayat Qiu, Qingzheng Zheng, Xiquan Chen, Hongyu Cheng, Zi-Jia Yang, Xian P. Kim, Byunghoon Yin, Jia-Xin Zhang, Songbo Litskevich, Maksim Zhang, Qi Cochran, Tyler A. Peng, Yingying Chang, Guoqing Guo, Yanfeng Thomale, Ronny Neupert, Titus Hasan, M. Zahid |
| author_facet | Jiang, Yu-Xiao Shao, Sen Xia, Wei Denner, M. Michael Ingham, Julian Hossain, Md Shafayat Qiu, Qingzheng Zheng, Xiquan Chen, Hongyu Cheng, Zi-Jia Yang, Xian P. Kim, Byunghoon Yin, Jia-Xin Zhang, Songbo Litskevich, Maksim Zhang, Qi Cochran, Tyler A. Peng, Yingying Chang, Guoqing Guo, Yanfeng Thomale, Ronny Neupert, Titus Hasan, M. Zahid |
| contents | Novel states of matter arise in quantum materials due to strong interactions among electrons. A nematic phase breaks the point group symmetry of the crystal lattice and is known to emerge in correlated materials. Here we report the observation of an intra-unit-cell nematic order and signatures of Pomeranchuk instability in the Kagome metal ScV6Sn6. Using scanning tunneling microscopy and spectroscopy, we reveal a stripe-like nematic order breaking the crystal rotational symmetry within the Kagome lattice itself. Moreover, we identify a set of van Hove singularities adhering to the Kagome layer electrons, which appear along one direction of the Brillouin zone while being annihilated along other high-symmetry directions, revealing a rotational symmetry breaking. Via detailed spectroscopic maps, we further observe an elliptical deformation of Fermi surface, which provides direct evidence for an electronically mediated nematic order. Our work not only bridges the gap between electronic nematicity and Kagome physics, but also sheds light on the potential mechanism for realizing symmetry-broken phases in correlated electron systems. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2406_13702 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Van-Hove annihilation and nematic instability on a Kagome lattice Jiang, Yu-Xiao Shao, Sen Xia, Wei Denner, M. Michael Ingham, Julian Hossain, Md Shafayat Qiu, Qingzheng Zheng, Xiquan Chen, Hongyu Cheng, Zi-Jia Yang, Xian P. Kim, Byunghoon Yin, Jia-Xin Zhang, Songbo Litskevich, Maksim Zhang, Qi Cochran, Tyler A. Peng, Yingying Chang, Guoqing Guo, Yanfeng Thomale, Ronny Neupert, Titus Hasan, M. Zahid Strongly Correlated Electrons Materials Science Novel states of matter arise in quantum materials due to strong interactions among electrons. A nematic phase breaks the point group symmetry of the crystal lattice and is known to emerge in correlated materials. Here we report the observation of an intra-unit-cell nematic order and signatures of Pomeranchuk instability in the Kagome metal ScV6Sn6. Using scanning tunneling microscopy and spectroscopy, we reveal a stripe-like nematic order breaking the crystal rotational symmetry within the Kagome lattice itself. Moreover, we identify a set of van Hove singularities adhering to the Kagome layer electrons, which appear along one direction of the Brillouin zone while being annihilated along other high-symmetry directions, revealing a rotational symmetry breaking. Via detailed spectroscopic maps, we further observe an elliptical deformation of Fermi surface, which provides direct evidence for an electronically mediated nematic order. Our work not only bridges the gap between electronic nematicity and Kagome physics, but also sheds light on the potential mechanism for realizing symmetry-broken phases in correlated electron systems. |
| title | Van-Hove annihilation and nematic instability on a Kagome lattice |
| topic | Strongly Correlated Electrons Materials Science |
| url | https://arxiv.org/abs/2406.13702 |