Observation of quadruple Weyl point in hybrid-Weyl phononic crystals
| Autor: | Li Luo, Weiyin Deng, Yating Yang, Mou Yan, Jiuyang Lu, Xueqin Huang, Zhengyou Liu |
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| Rok vydání: | 2022 |
| Předmět: |
Condensed Matter - Materials Science
Condensed Matter - Mesoscale and Nanoscale Physics Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences Condensed Matter::Strongly Correlated Electrons Mathematics::Spectral Theory Mathematics::Representation Theory |
| DOI: | 10.48550/arxiv.2203.14600 |
| Popis: | The discovery of Weyl semimetals opens the door for searching topological semimetals in physical science. The Weyl points are generally recognized as conventional, quadratic, spin-1, and those of high topological charges. Here we report the observation of the quadruple Weyl point of charge 4, the highest topological charge a twofold degenerate node can carry. Besides the quadruple Weyl point, the phononic semimetal also hosts conventional, quadratic, and spin-1 Weyl points, which stands as a system with yet the richest types of Weyl points. The quadruple-helicoid surface states, specific to the quadruple Weyl point, are demonstrated. The finding of the high-charge Weyl point enriches the knowledge of Weyl semimetals and may stimulate related researches in other systems, such as photonic, mechanical and cold atom systems. Comment: 15 pages, 3 figures, and 1 table |
| Databáze: | OpenAIRE |
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