Subwavelength Chiral Spiral Acoustic Metamaterials for a Robust Topological Acoustic Insulator
Applied Sciences, 2022 Topological acoustic insulators enable sound waves to transmit along the surface without backscattering, which builds a new pathway towards sound wave control.
Tao Yang +5 more
doaj +4 more sources
Topological dislocation modes in three-dimensional acoustic topological insulators [PDF]
Nature Communications, 2022 Flexible wave manipulations are crucial in the development of application for topological insulators. By stacking a 2D network of coupled acoustic resonators the authors demonstrate a 3D acoustic topological insulator with arbitrarily controllable ...
Liping Ye +6 more
doaj +5 more sources
Pseudospin-dependent Acoustic Topological Insulator by Sonic Crystals With Same Hexagonal Rods
Frontiers in Physics, 2021 We report the experimental and numerical realization of a pseudospin-dependent acoustic topological insulator based on two sonic crystals constructed by the same regular hexagonal rods.
Ding Jia +7 more
doaj +3 more sources
Reversible tunable topological phononic crystals based upon thermo-acoustic hydrogels [PDF]
Microsystems & NanoengineeringTopological insulator originally found in electronic systems has inspired an analogue in phononic crystals, which has revolutionized fundamental concepts of elastic and acoustic transmission, offering one-way propagation edge modes immune to ...
Meng Lian +5 more
doaj +2 more sources
Observation of returning Thouless pumping [PDF]
Nature CommunicationsIntroduced by David Thouless in 1983, Thouless pumping is a driving mechanism for topological systems where the pumped charge is quantized by the Chern number.
Zheyu Cheng +8 more
doaj +2 more sources
Temperature tunability of topological phase transitions and edge states in two-dimensional acoustic topological insulators [PDF]
Scientific ReportsTopological insulators are characterized by exhibiting an internal insulating state but a surface conductor state, which makes them advantageous for applications in novel devices.
Yangyang Chu +3 more
doaj +2 more sources
Improvement of SAW Resonator Performance by Petal-like Topological Insulator [PDF]
SensorsThis article introduces a novel petal-like SAW topology insulator, which can transmit sound waves with low loss and high flexibility in an ultra-wide frequency band by simultaneously adjusting multiple structural parameters of phononic crystals.
Jin Bai, Lixia Li, Chenyang Chai
doaj +2 more sources
Spin resolved topological bulk state in acoustics [PDF]
Scientific ReportsExtremely rare topologically protected acoustic energy sink is presented in this article. Acoustic topological phenomena are generally described using quantum anomalous hall effects (QAHE), quantum valley hall effects (QVHE), and quantum spin hall ...
Mustahseen M. Indaleeb, Sourav Banerjee
doaj +2 more sources
Physical Review X, 2021 We present a theoretical study and experimental realization of a system that is simultaneously a four-dimensional (4D) Chern insulator and a higher-order topological insulator.
Ze-Guo Chen +4 more
doaj +1 more source
Time-periodic corner states from Floquet higher-order topology
Nature Communications, 2022 A combination of Floquet engineering and higher-order topological insulators has been lately only theoretically proposed. Here the authors experimentally realize an acoustic waveguides array to demonstrate a Floquet higherorder topological insulator ...
Weiwei Zhu +4 more
doaj +1 more source