Results 31 to 40 of about 575 (159)

Dirac Cone Characteristics of Hexachiral Phononic Crystal

Shanghai Jiaotong Daxue xuebao, 2021
The band structure properties of phononic crystal is important to evaluate the vibration and noise reduction of acoustic metamaterials. Taking the 2D hexachiral phononic crystal as an example, the band structure and Dirac cone properties were ...
CHEN Luyun, WANG Jian, CUI Yifeng, KONG Hui
doaj   +1 more source

Experimental demonstration of anomalous Floquet topological insulator for sound

Nature Communications, 2016
Topological protected acoustic wave propagation has been predicted, but yet awaits for experimental demonstration. Here, Peng et al. report one-way propagation of pseudo-spin-dependent edge states for sound, analogous to Floquet topological insulator in ...
Yu-Gui Peng, Cheng-Zhi Qin, De-Gang Zhao, Ya-Xi Shen, Xiang-Yuan Xu, Ming Bao, Han Jia, Xue-Feng Zhu   +7 more
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Directional Acoustic Antennas Based on Valley‐Hall Topological Insulators [PDF]

Advanced Materials, 2018
AbstractRealizing directional acoustic signal transmittance and reception robust against surrounding noise and competing signals is crucial in many areas such as communication, navigation, and detection for medical and industrial purposes. The fundamentally wide‐angled radiation pattern of most current acoustic sensors and transducers displays a major ...
Zhang, Zhiwang, Tian, Ye, Wang, Yihe, Gao, Shuxiang, Cheng, Ying, Liu, Xiaojun, Christensen, Johan   +6 more
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Observation of Dirac Hierarchy in Three-Dimensional Acoustic Topological Insulators

Physical Review Letters, 2022
Dirac cones (DCs) play a pivotal role in various unique phenomena ranging from massless electrons in graphene to robust surface states in topological insulators (TIs). Recent studies have theoretically revealed a full Dirac hierarchy comprising an eightfold bulk DC, a fourfold surface DC, and a twofold hinge DC, associated with a hierarchy of ...
Linyun Yang, Yin Wang, Yan Meng, Zhenxiao Zhu, Xiang Xi, Bei Yan, Shuxin Lin, Jingming Chen, Bin-jie Shi, Yong Ge, Shou-qi Yuan, Hongsheng Chen, Hong-xiang Sun, Gui-Geng Liu, Yihao Yang, Zhen Gao   +15 more
openaire   +4 more sources

Total acoustic transmission in a honeycomb network empowered by compact acoustic isolator

Scientific Reports, 2023
In recent years, acoustic metamaterials have exhibited extraordinary potential for manipulating the propagation of sound waves. However, it has been a challenge to control the propagation of sound waves through arbitrary pathways in a network.
Haixiao Zhang, Rong Li, Yu Bao, Xiaoli Liu, Yiwei Zhang   +4 more
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Electron–phonon coupling in copper intercalated Bi $$_{2}$$ 2 Se $$_{3}$$ 3

Scientific Reports, 2022
We report charge and heat transport studies in copper-intercalated topological insulator Bi $$_2$$ 2 Se $$_3$$ 3 hybrid devices. Measured conductivity shows impact of quantum corrections, electron–electron and electron–phonon interactions. Our shot noise
Maciej Wiesner, Kristie Koski, Antti Laitinen, Juuso Manninen, Alexander A. Zyuzin, Pertti Hakonen   +5 more
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Some information on acoustic topological insulator

, 2023
In this exceedingly short review article, we have provided some information on acoustic topological insulator for pedagogical purpose. Since, intrinsically acoustic systems do not have Kramers doublets due to spin-zero status, artificially acoustic spin-half states could be engineered as reported in refs. 5-26 maintaining time reversal symmetry.
Goswami, Partha, Tyagi, Udai Prakash
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Deep‐Subwavelength Holey Acoustic Second‐Order Topological Insulators [PDF]

Advanced Materials, 2019
AbstractHigher‐order topological insulators (HOTIs) belong to a new class of materials with unusual topological phases. They have garnered considerable attention due to their capabilities in confining energy at the hinges and corners, which is entirely protected by the topology, and have thus become attractive structures for acoustic wave studies and ...
Zhang, Zhiwang, Long, Houyou, Liu, Chen, Shao, Chen, Cheng, Ying, Liu, Xiaojun, Christensen, Johan   +6 more
openaire   +3 more sources

Möbius edge band and Weyl-like semimetal flat-band in topological photonic waveguide array by synthetic gauge flux

Nanophotonics, 2023
The presence of π gauge flux enabled by positive and negative hopping amplitude can lead to Möbius bands, which was recently demonstrated in both realistic acoustic and photonic lattices, twisted at k = π.
Liu Zhenzhen, Wei Guochao, Wu Huizhou, Xiao Jun-Jun   +3 more
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Revealing the Substrate Dependent Ultrafast Phonon Dynamics in Bi2Se3 Thin Films

Advanced Materials Interfaces, 2023
The bulk carrier excitation influences the phonon dynamics, which can alter and modulate the surface charge density of topological insulators such as bismuth selenide (Bi2Se3). This work investigates the charge carrier and phonon dynamics in Bi2Se3 grown
Saurabh K. Saini, Naveen Kumar Tailor, Prince Sharma, Lavi Tyagi, Nikita Vashistha, Rimjhim Yadav, Amit Kumar Chaudhary, Soumitra Satapathi, Mahesh Kumar   +8 more
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