Acoustic higher-order topology derived from first-order with built-in Zeeman-like fields

作     者：Xueqin Huang Jiuyang Lu Zhongbo Yan Mou Yan Weiyin Deng Gang Chen Zhengyou Liu 黄学勤;陆久阳;严忠波;严谋;邓伟胤;陈刚;刘正猷

作者机构：School of Physics and OptoelectronicsSouth China University of TechnologyGuangzhou 510640China School of PhysicsSun Yat-Sen UniversityGuangzhou 510275China State Key Laboratory of Quantum Optics and Quantum Optics DevicesInstitute of Laser SpectroscopyShanxi UniversityTaiyuan 030006China Collaborative Innovation Center of Light Manipulations and ApplicationsShandong Normal UniversityJinan 250358China Key Laboratory of Artificial Micro-and Nanostructures of Ministry of Education and School of Physics and TechnologyWuhan UniversityWuhan 430072China Institute for Advanced StudiesWuhan UniversityWuhan 430072China 

出 版 物：《Science Bulletin》 (科学通报（英文版）)

年 卷 期：2022年第67卷第5期

页      面：488-494,M0004页

核心收录：

学科分类：07[理学] 082403[工学-水声工程] 08[工学] 070206[理学-声学] 0824[工学-船舶与海洋工程] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(11890701,11974120,11974005,12074128,12074232,12125406,and 12174455) the National Key R&D Program of China(2018YFA0305800) the Guangdong Basic and Applied Basic Research Foundation(2019B151502012,2021B1515020086,and 2021A1515010347) the Science and Technology Projects in Guangzhou(202102020960) 

主　　题：Higher-order topological insulator Corner state Kane-Mele model Zeeman field Phononic crystal 

摘      要：Higher-order topological insulators(HOTIs),with topological corner or hinge states,have emerged as a thriving topic in the field of topological ***,few connections have been found for HOTIs with well-explored first-order topological *** a proposal asserted that a significant bridge can be established between the HOTIs and Z2 topological *** subjected to an inplane Zeeman field,corner states,the signature of the HOTIs,can be induced in a Z2 topological *** Zeeman fields can be produced,for example,by the ferromagnetic proximity effect or magnetic atom doping,which drastically increases the experimental ***,we show that a phononic crystal,designed as a bilayer of coupled acoustic cavities,exactly hosts the Kane-Mele model with built-in in-plane Zeeman *** helical edge states along the zigzag edges are gapped,and the corner states,localized spatially at the corners of the samples,appear in the *** verifies the Zeeman field induced higher-order *** further demonstrate the intriguing contrast properties of the corner states at the outer and inner corners in a hexagonal ring-shaped sample.