976 citations · 3.9k across the 37 of their papers we have counts for
37 papers
Acoustic Higher-Order Topological Insulators Protected by Multipole Chiral Numbers
Yuzeng Li, Qicheng Zhang, Chunyin Qiu
Recently, the higher-order topological phases from the chiral AIII symmetry classes are characterized by a Z topological invariant known as the multipole chiral numbers, which indi…
Observation of Acoustic Non-Hermitian Bloch Braids and Associated Topological Phase Transitions
Qicheng Zhang, Yitong Li, Huanfa Sun +5
Topological features embedded in ancient braiding and knotting arts endow significant impacts on our daily life and even cutting-edge science. Recently, fast growing efforts are in…
A Universal Mirror-stacking Approach for Constructing Topological Bound States in the Continuum
Luohong Liu, Tianzi Li, Qicheng Zhang +2
Bound states in the continuum (BICs) are counter-intuitive localized states with eigenvalues embedded in the continuum of extended states. Recently, nontrivial band topology is exp…
Tracking valley topology with synthetic Weyl paths
Xiying Fan, Tianzhi Xia, Huahui Qiu +2
Inspired by the newly emergent valleytronics, great interest has been attracted to the topological valley transport in classical metacrystals. The presence of nontrivial domain-wal…
Minimal non-abelian nodal braiding in ideal metamaterials
Huahui Qiu, Qicheng Zhang, Tingzhi Liu +3
Exploring new topological phases and phenomena has become a vital topic in condensed matter physics and material sciences. It is generally believed that a pair of band nodes with o…
Observation of Moiré Flat Bands in Sonic Crystals
Tingzhi Liu, Xingjian Zhang, Qicheng Zhang +3
Recently, artificial moire superlattices of classical waves have aroused tremendous interest, inspired by the newly emergent twistronics that focuses on the peculiar electronic pro…
Realization of Surface-Obstructed Topological Insulators
Juan Du, Tianzi Li, Xiying Fan +2
Recently, higher-order topological insulators have been attracting extensive interest. Unlike the conventional topological insulators that demand bulk gap closings at transition po…
Acoustic Möbius insulators from projective symmetry
Tianzi Li, Juan Du, Qicheng Zhang +4
Symmetry plays a critical role in classifying phases of matter. This is exemplified by how crystalline symmetries enrich the topological classification of materials and enable unco…
Topological dislocation modes in three-dimensional acoustic topological insulators
Liping Ye, Chunyin Qiu, Meng Xiao +4
Dislocations are ubiquitous in three-dimensional solid-state materials. The interplay of such real space topology with the emergent band topology defined in reciprocal space gives…
Acoustic realization of quadrupole topological insulators
Yajuan Qi, Chunyin Qiu, Meng Xiao +3
A quadrupole topological insulator, being one higher-order topological insulator with nontrivial quadrupole quantization, has been intensely investigated very recently. However, th…
Higher-order Dirac sonic crystals
Huahui Qiu, Meng Xiao, Fan Zhang +1
Discovering new topological phases of matter is a major theme in fundamental physics and materials science. Dirac semimetal provides an exceptional platform for exploring topologic…
Symmetry-enforced three-dimensional Dirac phononic crystals
Xiangxi Cai, Liping Ye, Chunyin Qiu +4
Dirac semimetals, the materials featured with discrete linearly crossing points (called Dirac points) between four bands, are critical states of topologically distinct phases. Such…
Observation of quadratic Weyl points and double-helicoid arcs
Hailong He, Chunyin Qiu, Xiangxi Cai +4
Very recently, novel quasiparticles beyond those mimicking the elementary high-energy particles such as Dirac and Weyl fermions have attracted great interest in condensed matter ph…
Polarity and spin-orbit coupling induced large interfacial exchange coupling an asymmetric charge transfer in iridate-manganite heterostructure
Tao Yu, Bei Deng, Liang Zhou +9
Charge transfer is of particular importance in manipulating the interface physics in transition-metal oxide heterostructures. In this work, we have fabricated epitaxial bilayers co…
Probing Weyl Physics with One-dimensional Sonic Crystals
Xiying Fan, Chunyin Qiu, Yuanyuan Shen +4
Recently, intense efforts have been devoted to realizing classical analogues of various topological phases of matter. In this Letter, we explore the intriguing Weyl physics by a si…
Topological negative refraction of surface acoustic waves in a Weyl phononic crystal
Hailong He, Chunyin Qiu, Liping Ye +5
Reflection and refraction occur at interface between two different media. These two fundamental phenomena form the basis of fabricating various wave components. Specifically, refra…
Valley-projected edge modes observed in underwater sonic crystals
Yuanyuan Shen, Chunyin Qiu, Xiangxi Cai +4
Recently, the topological physics in acoustics has been attracting much attention. However, all the studies are aimed to elastic or airborne sound systems. Realizing topological in…
Observation of acoustic Landau quantization and quantum-Hall-like edge states
Xinhua Wen, Chunyin Qiu, Yajuan Qi +4
Many intriguing phenomena occur for electrons under strong magnetic fields. Recently, it was proposed that an appropriate strain texture in graphene can induce a synthetic gauge fi…
Valley Topological Phases in Bilayer Sonic Crystals
Jiuyang Lu, Chunyin Qiu, Weiyin Deng +5
Recently, the topological physics in artificial crystals for classical waves has become an emerging research area. In this Letter, we propose a unique bilayer design of sonic cryst…
Acoustic Dirac degeneracy and topological phase transitions realized by rotating scatterers
Xinhua Wen, Chunyin Qiu, Jiuyang Lu +3
The artificial crystals for classical waves provide a good platform to explore the topological physics proposed originally in condensed matter systems. In this paper, acoustic Dira…
Observation of topological valley transport of sound in sonic crystals
Jiuyang Lu, Chunyin Qiu, Liping Ye +4
Valley pseudospin, labeling quantum states of energy extrema in momentum space, is attracting tremendous attention1-13 because of its potential in constructing new carrier of infor…
Experimental observation of sound-mediated stable configurations for polystyrene particles
Mudi Wang, Chunyin Qiu, Shenwei Zhang +3
Here we present an experimental observation of the self-organization effect of the polystyrene particles formed by acoustically-induced interaction forces. Two types of stable conf…
Valley Vortex States in Sonic Crystals
Jiuyang Lu, Chunyin Qiu, Manzhu Ke +1
Valleytronics is quickly emerging as an exciting field in fundamental and applied research. In this Letter, we study the acoustic version of valley states in sonic crystals and rev…
Observation of Acoustic Valley Vortex States and Valley-Chirality Locked Beam Splitting
Liping Ye, Chunyin Qiu, Jiuyang Lu +5
The Letter reports an experimental observation of the classical version of valley polarized states in a two-dimensional hexagonal sonic crystal, where the inversion-symmetry breaki…