Pomeranchuk instability of a topological crystal
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arXiv
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| Autori principali: | , , , , , , , , , , , , , , , |
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| Natura: | Preprint |
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2024
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| author | Hossain, Md Shafayat Muhammad, Zahir Islam, Rajibul Cheng, Zi-Jia Jiang, Yu-Xiao Litskevich, Maksim Cochran, Tyler A. Yang, Xian P. Kim, Byunghoon Xue, Fei Perakis, Ilias E. Zhao, Weisheng Kargarian, Mehdi Balicas, Luis Neupert, Titus Hasan, M. Zahid |
| author_facet | Hossain, Md Shafayat Muhammad, Zahir Islam, Rajibul Cheng, Zi-Jia Jiang, Yu-Xiao Litskevich, Maksim Cochran, Tyler A. Yang, Xian P. Kim, Byunghoon Xue, Fei Perakis, Ilias E. Zhao, Weisheng Kargarian, Mehdi Balicas, Luis Neupert, Titus Hasan, M. Zahid |
| contents | Nematic quantum fluids appear in strongly interacting systems and break the rotational symmetry of the crystallographic lattice. In metals, this is connected to a well-known instability of the Fermi liquid-the Pomeranchuk instability. Using scanning tunneling microscopy, we identified this instability in a highly unusual setting: on the surface of an elemental topological metal, arsenic. By directly visualizing the Fermi surface of the surface state via scanning tunneling spectroscopy and photoemission spectroscopy, we find that the Fermi surface gets deformed and becomes elliptical at the energies where the nematic state is present. Known instances of nematic instability typically need van-Hove singularities or multi-orbital physics as drivers. In contrast, the surface states of arsenic are essentially indistinguishable from well-confined isotropic Rashba bands near the Fermi level, rendering our finding the first realization of Pomeranchuk instability of the topological surface state. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_19636 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Pomeranchuk instability of a topological crystal Hossain, Md Shafayat Muhammad, Zahir Islam, Rajibul Cheng, Zi-Jia Jiang, Yu-Xiao Litskevich, Maksim Cochran, Tyler A. Yang, Xian P. Kim, Byunghoon Xue, Fei Perakis, Ilias E. Zhao, Weisheng Kargarian, Mehdi Balicas, Luis Neupert, Titus Hasan, M. Zahid Strongly Correlated Electrons Mesoscale and Nanoscale Physics Materials Science Nematic quantum fluids appear in strongly interacting systems and break the rotational symmetry of the crystallographic lattice. In metals, this is connected to a well-known instability of the Fermi liquid-the Pomeranchuk instability. Using scanning tunneling microscopy, we identified this instability in a highly unusual setting: on the surface of an elemental topological metal, arsenic. By directly visualizing the Fermi surface of the surface state via scanning tunneling spectroscopy and photoemission spectroscopy, we find that the Fermi surface gets deformed and becomes elliptical at the energies where the nematic state is present. Known instances of nematic instability typically need van-Hove singularities or multi-orbital physics as drivers. In contrast, the surface states of arsenic are essentially indistinguishable from well-confined isotropic Rashba bands near the Fermi level, rendering our finding the first realization of Pomeranchuk instability of the topological surface state. |
| title | Pomeranchuk instability of a topological crystal |
| topic | Strongly Correlated Electrons Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2410.19636 |