Observation of Emergent Dirac Physics at the Surfaces of Acoustic Higher-Order Topological Insulators
文献类型：期刊论文
| 作者 | Meng, Fei; Lin, Zhi-Kang; Li, Weibai; Yan, Peiguang; Zheng, Yun; Li, Xinping; Jiang, Jian-Hua; Jia, Baohua; Huang, Xiaodong |
| 刊名 | ADVANCED SCIENCE
 |
| 出版日期 | 2022-08-01 |
| 卷号 | 9期号:24 |
| 关键词 | acoustic high-order topological insulator Dirac mass hinge state surface state zero refractive index |
| 英文摘要 | Using 3D sonic crystals as acoustic higher-order topological insulators (HOTIs), 2D surface states described by spin-1 Dirac equations at the interfaces between the two sonic crystals with distinct topology but the same crystalline symmetry are discovered. It is found that the Dirac mass can be tuned by the geometry of the two sonic crystals. The sign reversal of the Dirac mass reveals a surface topological transition where the surface states exhibit zero refractive index behavior. When the surface states are gapped, 1D hinge states emerge due to the topology of the gapped surface states. The zero refractive index behavior and the emergent topological hinge states are confirmed experimentally. This study reveals a multidimensional Wannier orbital control that leads to extraordinary properties of surface states and unveils an interesting topological mechanism for the control of surface waves. |
| 学科主题 | Chemistry ; Science & Technology - Other Topics ; Materials Science |
| 语种 | 英语 |
| 出版者 | WILEY |
| WOS记录号 | WOS:000815792400001 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35496]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Swinburne University of Technology; 2.Wuhan University of Technology; 3.Soochow University - China; Soochow University - China; 4.Shenzhen University; 5.Chinese Academy of Sciences; Wuhan Institute of Rock & Soil Mechanics, CAS |
| 推荐引用方式 GB/T 7714 | Meng, Fei,Lin, Zhi-Kang,Li, Weibai,et al. Observation of Emergent Dirac Physics at the Surfaces of Acoustic Higher-Order Topological Insulators[J]. ADVANCED SCIENCE,2022,9(24). |
| APA | Meng, Fei.,Lin, Zhi-Kang.,Li, Weibai.,Yan, Peiguang.,Zheng, Yun.,...&Huang, Xiaodong.(2022).Observation of Emergent Dirac Physics at the Surfaces of Acoustic Higher-Order Topological Insulators.ADVANCED SCIENCE,9(24). |
| MLA | Meng, Fei,et al."Observation of Emergent Dirac Physics at the Surfaces of Acoustic Higher-Order Topological Insulators".ADVANCED SCIENCE 9.24(2022). |
入库方式： OAI收割
来源：武汉岩土力学研究所
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