Realization of quasicrystalline quadrupole topological insulators in electrical circuits

Lv，Bo1; Chen，Rui2,3,4; Li，Rujiang5; Guan，Chunying1; Zhou，Bin2; Dong，Guohua1; Zhao，Chao1; Li，Yi Cheng1; Wang，Ying1; Tao，Huibin6; Shi，Jinhui1; Xu，Dong Hui2

2021-12-01

10.1038/s42005-021-00610-7

Communications Physics   影响因子和分区

2399-3650

Quadrupole topological insulators are a new class of topological insulators with quantized quadrupole moments, which support protected gapless corner states. The experimental demonstrations of quadrupole-topological insulators were reported in a series of artificial materials, such as photonic crystals, acoustic crystals, and electrical circuits. In all these cases, the underlying structures have discrete translational symmetry and thus are periodic. Here we experimentally realize two-dimensional aperiodic-quasicrystalline quadrupole-topological insulators by constructing them in electrical circuits, and observe the spectrally and spatially localized corner modes. In measurement, the modes appear as topological boundary resonances in the corner impedance spectra. Additionally, we demonstrate the robustness of corner modes on the circuit. Our circuit design may be extended to study topological phases in higher-dimensional aperiodic structures.

SCI ; EI

英语

其他

WOS:000659020500001

20212210446579

Acoustic impedance ; Electric insulators ; Integrated circuit manufacture ; Photonic crystals ; Timing circuits ; Topology

Electric Networks:703.1 ; Pulse Circuits:713.4 ; Semiconductor Devices and Integrated Circuits:714.2 ; Acoustic Properties of Materials:751.2 ; Combinatorial Mathematics, Includes Graph Theory, Set Theory:921.4

2-s2.0-85106912661

Scopus

1.Key Laboratory of In-Fiber Integrated Optics of Ministry of Education,College of Physics and Optoelectronic Engineering,Harbin Engineering University,Harbin,China
2.Department of Physics,Hubei University,Wuhan,China
3.Shenzhen Institute for Quantum Science and Engineering and Department of Physics,Southern University of Science and Technology (SUSTech),Shenzhen,China
4.School of Physics,Southeast University,Nanjing,China
5.Key Laboratory of Antennas and Microwave Technology,School of Electronic Engineering,Xidian University,Xi’an,China
6.School of Software Engineering,Xi’an Jiaotong University,Xi’an,China

Lv，Bo,Chen，Rui,Li，Rujiang,et al. Realization of quasicrystalline quadrupole topological insulators in electrical circuits[J]. Communications Physics,2021,4(1).

Lv，Bo.,Chen，Rui.,Li，Rujiang.,Guan，Chunying.,Zhou，Bin.,...&Xu，Dong Hui.(2021).Realization of quasicrystalline quadrupole topological insulators in electrical circuits.Communications Physics,4(1).

Lv，Bo,et al."Realization of quasicrystalline quadrupole topological insulators in electrical circuits".Communications Physics 4.1(2021).