475 citations · 2.1k across the 29 of their papers we have counts for
30 papers
Unveiling spin-orbital angular momentum locking in photonic Dirac vortex cavities
Haitao Li, Jiusi Yu, Jiayu Fan +6
Dirac vortices, originally studied in quantum field theories to predict localized zero-energy modes, were recently realized in photonics, leading to Dirac vortex cavities. With top…
Quadrupole topological behavior of elastic waves in two-dimensional square lattices with nonsymmorphic symmetries
Yijie Liu, Yuyang Chen, Zhaoyang Guo +4
We investigate a novel higher-order topological behavior in elastic lattices characterized by nonsymmorphic symmetries. In the theoretical spring-mass lattice, altering the vertex…
Observation of a -orbital higher-order topological insulator phase in puckered lattice acoustic metamaterials
Bing-Quan Wu, Zhi-Kang Lin, Li-Wei Wang +1
The puckered lattice geometry, along with -orbitals is often overlooked in the study of topological physics. Here, we investigate the higher-order topology of the -orbi…
Non-Hermitian topological phases and skin effects in kagome lattices
Li-Wei Wang, Zhi-Kang Lin, Jian-Hua Jiang
Non-Hermitian physics has added new ingredients to topological physics, leading to the rising frontier of non-Hermitian topological phases. In this study, we investigate Chern insu…
Probing fragile topology with a screw dislocation
Ying Wu, Zhi-Kang Lin, Yating Yang +3
Fragile topology, akin to twisted bilayer graphene and the exotic phases therein, is a notable topological class with intriguing properties. However, due to its unique nature and t…
Measuring entanglement entropy and its topological signature for phononic systems
Zhi-Kang Lin, Yao Zhou, Bin Jiang +6
Entanglement entropy is a fundamental concept with rising importance in different fields ranging from quantum information science, black holes to materials science. In complex mate…
Topological phononic metamaterials
Weiwei Zhu, Weiyin Deng, Yang Liu +6
The concept of topological energy bands and their manifestations have been demonstrated in condensed matter systems as a fantastic paradigm toward unprecedented physical phenomena…
Topological phenomena at topological defects
Zhi-Kang Lin, Qiang Wang, Yang Liu +4
There are two prominent applications of the mathematical concept of topology to the physics of materials: band topology, which classifies different topological insulators and semim…
Hybrid topological photonic crystals
Yanan Wang, Hai-Xiao Wang, Li Liang +8
Photonic topological phases offering unprecedented manipulation of electromagnetic waves have attracted much research interest which, however, have been mostly restricted to a sing…
Observation of fractal topological states in acoustic metamaterials
Shengjie Zheng, Xianfeng Man, Ze-Lin Kong +6
Topological phases of matter have been extensively investigated in solid state materials and classical wave systems with integer dimensions. However, topological states in non-inte…
Observation of an acoustic topological Euler insulator with meronic waves
Bin Jiang, Adrien Bouhon, Shi-Qiao Wu +4
Topological band theory has conventionally been concerned with the topology of bands around a single gap. Only recently non-Abelian {topologies that thrive on involving multiple ga…
Observation of emergent Dirac physics at the surfaces of acoustic higher-order topological insulators
Fei Meng, Zhi-Kang Lin, Weibai Li +5
Using three-dimensional (3D) sonic crystals as acoustic higher-order topological insulators (HOTIs), we discover two-dimensional (2D) surface states described by spin-1 Dirac equat…
p-orbital disclination states in non-Euclidean geometries
Ying Chen, Yuhang Yin, Ze-Huan Zheng +5
Disclinations are ubiquitous lattice defects existing in almost all crystalline materials. In two-dimensional nanomaterials, disclinations lead to the warping and deformation of th…
Dirac cones and higher-order topology in quasi-continuous media
Zhi-Kang Lin, Jian-Hua Jiang
We consider the Dirac cones and higher-order topological phases in quasi-continuous media of classical waves (e.g., photonic and sonic crystals). Using sonic crystals as prototype…
Topological Wannier cycles for the bulk and edges
Ze-Lin Kong, Zhi-Kang Lin, Jian-Hua Jiang
Topological materials are often characterized by unique edge states which are in turn used to detect different topological phases in experiments. Recently, with the discovery of va…
Observation of Higher-Order Topological States in Acoustic Twisted Moiré Superlattice
Shi-Qiao Wu, Zhi-Kang Lin, Bin Jiang +3
Twisted moiré superlattices (TMSs) are fascinating materials with exotic physical properties. Despite tremendous studies on electronic, photonic and phononic TMSs, it has never bee…
Experimental realization of single-plaquette gauge flux insertion and topological Wannier cycles
Zhi-Kang Lin, Ying Wu, Bin Jiang +4
Gauge fields are at the heart of the fundamental science of our universe and various materials. For instance, Laughlin's gedanken experiment of gauge flux insertion played a major…
Observation of non-Abelian topological semimetals and their phase transitions
Bin Jiang, Adrien Bouhon, Zhi-Kang Lin +5
Topological phases of matter lie at the heart of physics, connecting elegant mathematical principles to real materials that are believed to shape future electronic and quantum comp…
Observation of a phononic higher-order Weyl semimetal
Li Luo, Hai-Xiao Wang, Bin Jiang +4
Weyl semimetals are extraordinary systems where exotic phenomena such as Fermi arcs, pseudo-gauge fields and quantum anomalies arise from topological band degeneracy in crystalline…
On-chip higher-order topological micromechanical metamaterials
Ying Wu, Mou Yan, Hai-Xiao Wang +2
Higher-order topological insulators exhibit multidimensional topological physics and unique application values due to their ability of integrating stable boundary states at multipl…
Higher-Order Weyl Semimetals
Hai-Xiao Wang, Zhi-Kang Lin, Bin Jiang +2
Higher-order topology yields intriguing multidimensional topological phenomena, while Weyl semimetals have unconventional properties such as chiral anomaly. However, so far, Weyl p…
Higher-order topological spin Hall effect of sound
Zhi-Kang Lin, Shi-Qiao Wu, Hai-Xiao Wang +1
We propose theoretically a reconfigurable two-dimensional (2D) hexagonal sonic crystal with higher-order topology protected by the six-fold, , rotation symmetry. The acoustic…
Corner states and topological transitions in two-dimensional higher-order topological sonic crystals with inversion symmetry
Zhan Xiong, Zhi-Kang Lin, Hai-Xiao Wang +4
Macroscopic two-dimensional sonic crystals with inversion symmetry are studied to reveal higher-order topological physics in classical wave systems. By tuning a single geometry par…
Experimental discovery of bulk-disclination correspondence
Yang Liu, Shuwai Leung, Fei-Fei Li +4
Most natural and artificial materials have crystalline structures from which abundant topological phases emerge [1-6]. The bulk-edge correspondence, widely-adopted in experiments t…