Coexistence of All-Order Topological States in a Three-Dimensional Phononic Topological Crystalline Insulator  

作　　者：Hua-Shan Lai Hao Chen Chu-Hao Xia Si-Yuan Yu Cheng He Yan-Feng Chen 

机构地区：[1]National Laboratory of Solid State Microstructures&Department of Materials Science and Engineering,Nanjing University,Nanjng 210093,China [2]Collaborative Innovation Center of Advanced Microstructures Nanjing University,Nanjng 210093,China [3]Jiangsu Key Laboratory of Artificial Functional Materials Nanjing University,Nanjing 210093,China

出　　处：《Research》2024年第2期511-518,共8页研究（英文）

基　　金：supported by the National Key R&D Program of China(grant nos.2022YFA1404302 and 2022YFA1404404);the National Natural Science Foundation of China(grant no.52022038,92263207,11874196,11890700,and 51721001).

摘　　要：Classical-wave topological materials lacking intrinsic half-integer spins are less robust while more tunable.Here,we explore a single 3-dimensional phononic topological crystalline insulator that simultaneously exhibits a whole family of first-order quadratic surface,second-order hinge,and third-order corner states within the same bandgap.Such a topological crystalline insulator hosting all-order phases originates from the different topological nature when hierarchically projected onto different facets and lower dimensions,thus free from trivial cladding crystals.Our work offers an ideal platform for either robust wave propagation or localization in on-demand dimensions and may facilitate dimension division multiplexing technology.

关 键 词：TOPOLOGICAL dimensions CRYSTALLINE 

分 类 号：O469[理学—凝聚态物理]