一维颗粒声子晶体的拓扑相变及可调界面态OA北大核心CSCDCSTPCD
The topological phase transition and the tunable interface states in granular crystal
基于Su-Schrieffer-Heeger模型,构造了一种一维非线性声子晶体,通过调控外加在声子晶体上的预紧力,可调控声子晶体的拓扑态,从而实现拓扑相变.利用这一效应,把该非线性声子晶体与另一线性声子晶体形成异质结构,可以实现一种新型声学开关:通过调节预紧力即调控非线性声子晶体的拓扑相,可以实现异质结构中界面态从无到有的转变,从而实现了开关效应.利用该效应可望开发新型声学器件,如可调谐振器、可调滤波器、可调隔振器等.
Topological phase is a new degree of freedom to describe the state of matter in condensed matter physics.One could predict the existence of the interface state between two topological different phononic crystals.The band structures of phononic crystal depend on the characteristics of their composite and their combination,such as geometry,filling fraction,and stiffness.However,after the phononic crystal is fabricated out,it is relatively difficult to tune the…查看全部>>
王青海;李锋;黄学勤;陆久阳;刘正猷
华南理工大学物理与光电学院,广州 510640华南理工大学物理与光电学院,广州 510640华南理工大学物理与光电学院,广州 510640华南理工大学物理与光电学院,广州 510640武汉大学物理科学与技术学院,武汉430072
界面态可调拓扑相变颗粒声子晶体
interface statetunabilitytopological phase transitiongranular crystal
《物理学报》 2017 (22)
时空调制非线性离散声子晶体机理研究
55-62,8
Project supported by the National Basic Research Program of China (Grant No.2015CB755500),the National Natural Science Foundation of China (Grant Nos.61271139,11572318,11604102,11374233),Guangdong Innovative and Entrepreneurial Research Team Program,China (Grant No.2016ZT06C594),and the National Postdoctoral Program for Innovative Talents,China (Grant No.BX201600054).国家重点基础研究发展计划(批准号:2015CB755500)、国家自然科学基金(批准号:61271139,11572318,11604102,11374233)、广东省引进创新创业团队项目(批准号:2016ZT06C594)和博士后创新人才支持计划(批准号:BX201600054)资助的课题.
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