摘要
拓扑物态是当前凝聚态及材料物理领域的关注焦点.声子晶体是具有周期性结构的人工材料,其中的声子态或声波态也可具有拓扑性质.从声子晶体的背景知识出发,介绍了2类拓扑声子晶体的研究进展,即能谷声子晶体和外尔声子晶体,它们具有良好鲁棒性及超导传输特性的拓扑界/表面波,这种无障碍的传输特性具有广阔的应用前景.
Topological state of matter is currently the focus of attention in the field of condensed matter and material physics.Phononic crystal is an artificial material with periodic structure,in which photon state has topological properties.Starting from the background of phononic crystals,the research progress of two types of topological phononic crystals,namely Valley phononic crystals and Weyl phononic crystals were mainly introduced,and their good robustness and superconducting transmission were analyzed,which the properties would have broad application prospects.
作者
彭湃
刘正猷
PENG Pai;LIU Zheng-you(School of Mathematics and Physics, China University of Geosciences (Wuhan), Wuhan 430074, China;Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education,School of Physics and Technology, Wuhan University, Wuhan 430072, China)
出处
《物理实验》
2021年第5期1-9,共9页
Physics Experimentation
基金
国家自然科学基金重大项目(No.11890701)
国家自然科学基金面上项目(No.11774275)。
关键词
声子晶体
拓扑
鲁棒性
狄拉克锥
声谷态
外尔声子晶体
外尔半金属
费米弧
phononic crystal
topology
robustness
Dirac cone
acoustic valley state
Weyl phononic crystal
Weyl semimetal
Fermi arc