典型文献
Higher-order topological phase in an acoustic fractal lattice
文献摘要：
Higher-order topological insulators(HOTIs)are a newly devel-oped topological phase which hosts higher-codimensional topolog-ical states with lower dimensionality localized at the"boundaries of boundaries"[1,2].There are various methods to induce a higher-order topological phase.A quintessential example is the quadrupole insulator based on the Benalcazar,Bernevig,and Hughes(BBH)model[1],which has vanishing dipole polarization but a quantized quadrupole moment.Due to the extended higher-order bulk-boundary correspondence principle,a two-dimensional(2D)quadrupole insulator supports OD in-gap corner states and 1D gapped edge states.Another canonical approach is to directly generalize the 1D SSH model to higher dimensions.By changing the relative strength of the intra-and inter-hopping in a 2D system,we can induce a second-order topological phase whose topological invariant is the dipole polarization,instead of the quad-rupole moment.Over the past decade,these approaches have enriched the research on HOTIs as well as the conventional topolog-ical insulators,given the feasibility of designing artificial crystals where the coupling scheme can be easily engineered.So far,HOTIs have been extensively studied in the classical-wave systems,such as in photonics[3],acoustics[4]and electric circuits[5,6].
文献关键词：
中图分类号：
作者姓名：
Junkai Li;Qingyang Mo;Jian-Hua Jiang;Zhaoju Yang
作者机构：
Department of Physics,Interdisciplinary Center for Quantum Information and Zhejiang Province Key Laboratory of Quantum Technology and Device,Zhejiang University,Hangzhou 310058,China;School of Physical Science and Technology,and Collaborative Innovation Center of Suzhou Nano Science and Technology,Soochow University,Suzhou 215031,China
文献出处：
引用格式：
[1]Junkai Li;Qingyang Mo;Jian-Hua Jiang;Zhaoju Yang-.Higher-order topological phase in an acoustic fractal lattice)[J].科学通报（英文版）,2022(20):2040-2044
A类：
HOTIs,codimensional,quintessential,Benalcazar,Bernevig,rupole
B类：
Higher,order,topological,phase,fractal,lattice,insulators,are,newly,devel,oped,which,hosts,higher,states,lower,dimensionality,localized,boundaries,There,various,methods,induce,example,quadrupole,Hughes,BBH,model,vanishing,dipole,polarization,but,quantized,moment,Due,extended,bulk,boundary,correspondence,principle,two,2D,supports,OD,corner,1D,gapped,edge,Another,canonical,directly,generalize,SSH,dimensions,By,changing,relative,strength,intra,inter,hopping,second,whose,invariant,instead,Over,past,decade,these,approaches,have,enriched,research,well,conventional,given,feasibility,designing,artificial,crystals,where,coupling,scheme,easily,engineered,So,far,been,extensively,studied,classical,wave,systems,such,photonics,acoustics,electric,circuits
AB值：
0.538285
相似文献
机标中图分类号，由域田数据科技根据网络公开资料自动分析生成，仅供学习研究参考。
