Phononic real chern insulator
WebThe real Chern number leads to a pair of hinge Fermi arcs, whereas the winding number protects a double drumhead surface bands. We develop a low-energy model for 3D graphdiyne which captures the essential topological physics. Experimental aspects and possible topological transition to a 3D real Chern insulator phase are discussed. 展开 WebOct 20, 2024 · We identify the nontrivial phononic band gaps, which are characterized by nontrivial real Chern numbers enabled by the spacetime inversion symmetry. The protected phonon corner modes are verified by the calculation on a finite-size nanodisk. Our study extends the scope of higher-order topology to phonons in real materials.
Phononic real chern insulator
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WebPhotonic Chern insulator through homogenization of an array of particles Meng Xiao and Shanhui Fan* Department of Electrical Engineering and Ginzton Laboratory, Stanford … Webtronic systems, including topological insulators, topological semi-metals, and topological superconductors, which have driven the frontier of condensed matter physics and materials science for about two de-cades. However, related topological studies of phonons were scarce at that time. Similar to electrons, phonons can also be studied by crit-
WebMar 8, 2024 · The protected phonon corner modes are verified by the calculation on a finite-size nanodisk. In addition, we show that a 3D real Chern insulator state can be realized for phonons in 3D graphdiyne. Our study extends the scope of higher-order topology to phonons in real materials. WebPhononic’s solid state technology and integrated system designs is a transformational approach to cooling, refrigeration and HVAC that makes an impact on greenhouse gas …
Here, we study phonons in 2D graphyne family materials. By using first-principle calculations and topology/symmetry analysis, we find that phonons in both graphdiyne and γ -graphyne exhibit a second-order topology, which belongs to the specific case known as real Chern insulator. WebThe protected phonon corner modes are verified by the calculation on a finite-size nanodisk. In addition, we show that a 3D real Chern insulator state can be realized for …
WebBand topology of materials describes the extent Bloch wavefunctions are twisted in momentum space. Such descriptions rely on a set of topological invariants, generally referred to as topological charges, which form a characteristic class in the mathematical structure of fiber bundles associated with the Bloch wavefunctions. For example, the …
WebApr 13, 2024 · Here, we realize a new type of topological insulator in a bilayer phononic crystal, which hosts simultaneously the first-order and second-order topologies, referred to here as the hybrid-order topological insulator. The one-dimensional gapless helical edge states, and zero-dimensional corner states coexist in the same system. cs70bm/sh61baWebDec 11, 2024 · It was understood that Chern insulators cannot be realized in the presence of PT symmetry. In this paper, we reveal a new class of PT-symmetric Chern insulators, … dynarex panty linersWebJan 11, 2024 · We report the experimental realization of an acoustic Chern insulator (ACI), by using an angular-momentum-biased resonator array with the broken Lorentz reciprocity. High Q-factor resonance of the constituent rotors is leveraged to reduce the required rotation speed. ACI is a new topological acousti … dynarex on demandWebJan 9, 2024 · We report the experimental realization of an acoustic Chern insulator (ACI), by using an angular-momentum-biased resonator array with the broken Lorentz reciprocity. … cs70n30anrWebJun 6, 2024 · Motivated by the recent experimental realizations of hyperbolic lattices in circuit quantum electrodynamics and the research interest in the non-Euclidean generalization of topological phenomena, we investigate the Chern insulator phases in a hyperbolic ${8,3}$ lattice, which is made from regular octagons (8-gons) such that the … dynarex ointment creamWebMay 3, 2024 · The phononic nodal chain here is guaranteed to exist in the spectrum, associated with the vector representation induced by the real-space vector basis. It should be noted that there are also... cs70bm sh61baWebinsulators protected by time-reversal symmetry remains scarce, which are considered to be more promising in applications such as the integrated devices. Here, we report the … dynarex non-woven sponges