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| 二维声子晶体中Zak相位诱导的界面态 | |
| 引用本文： | 高慧芬,周小芳,黄学勤. 二维声子晶体中Zak相位诱导的界面态[J]. 物理学报, 2022, 0(4): 135-140 |
| 作者姓名： | 高慧芬 周小芳 黄学勤 |
| 作者单位： | 长治学院物理系;华南理工大学物理与光电学院 |
| 基金项目： | 长治学院国家自然科学基金资金项目院级子项目(批准号:GZRZ2020002);山西省高等学校科技创新项目(批准号:2019L905);山西省教育科学规划(批准号:HLW-20121)资助的课题。 |
| 摘 要： | 界面态具有巨大的实际应用价值,因此寻找界面态是一个既有科学意义也有应用前景的课题.在本文中,我们通过把二维正方晶格声子晶体的结构单元进行倾斜,构造出具有线性狄拉克色散的斜方晶格体系.狄拉克色散引起体能带Zak相位的π跃变,使得位于狄拉克锥投影能带两边的带隙具有不同符号的表面阻抗,从而导致由正方晶体体系与由其“倾斜”的斜方晶格体系构成的界面处存在确定性的界面态. |
| 关 键 词： | 声子晶体 线性色散 界面态 Zak相位 |
Zak phase induced interface states in two-dimensional phononic crystals |
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| Gao Hui-Fen,Zhou Xiao-Fang,Huang Xue-Qin. Zak phase induced interface states in two-dimensional phononic crystals[J]. Acta Physica Sinica, 2022, 0(4): 135-140 | |
| Authors: | Gao Hui-Fen Zhou Xiao-Fang Huang Xue-Qin |
| Affiliation: | (Department of Physics,Changzhi University,Changzhi 046011,China;School of Physics and Optoelectronics,South China University of Technology,Guangzhou 510640,China) |
| Abstract: | Interface states have great practical applications,therefore,searching for the existence of interface states has both scientific significance and application prospects.In this work,we tilt the structure unite of two-dimensional phononic crystal with a square lattice to construct an oblique lattice possessing linear Dirac dispersion.The Dirac dispersion gives rise to aπjump of the Zak phases of the bulk bands,so that the projected band gaps at both sides of the Dirac cone have opposite signs of surface impedance,resulting in deterministic interface states at the interface formed by the phononic crystal with a square lattice and its tilted oblique lattice system. |
| Keywords: | phononic crystal linear dispersion interface state Zak phase |
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