Phononic real chern insulator
WebHere, 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 … WebPhononic real Chern insulator with protected corner modes in graphynes Physical Review B 2024-02-15 Journal article DOI: 10.1103/PhysRevB.105.085123 Contributors : Jiaojiao Zhu; Weikang Wu; Jianzhou Zhao; Cong Chen; Qianqian Wang; Xian-Lei Sheng; Lifa Zhang; Y. X. Zhao; Shengyuan A. Yang Show more detail Source : Crossref
Phononic real chern insulator
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WebLow-energy Hamiltonian ¶. We can also calculate the Chern number using the low-energy Hamiltonian. At Δ = − 2, the energy gap collapses at the Γ = (0, 0) point, near this point, we have. HΓ + k = kxσx + kyσy + (Δ + 2)σz. For the Hamiltonian H(k) = kxσx + kyσy + mσz, we can get the monopole field for E − state is. Webrepresents a photonic Chern insulator. While there have been many theoretical proposals and experimental demonstrations of photonic Chern insulators [4–9], the effective medium model as proposed here represents another route for creating a Chern insulator. In this model, the Berry curvature peaks at k = 0, as shown in Fig. 1(d). Therefore, we ...
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. WebMar 8, 2024 · Here, we study phonons in 2D graphyne family materials. By using first-principle calculations and topology/symmetry analysis, we find that phonons in both …
WebFeb 15, 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 … WebFeb 17, 2024 · Magnet-free passive phononic Chern insulators To study topological phases in a PZM system, we develop a numerical method to solve the master equation, assuming …
Webusing a Phononic Crystal (PnC) to selectively confine elastic vibra-tions with wide-band spurious mode suppression. A unique feature of the design demonstrated here is a folded …
WebPhotonic Chern insulator through homogenization of an array of particles Meng Xiao and Shanhui Fan* Department of Electrical Engineering and Ginzton Laboratory, Stanford … fluffy pillow 翻译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. fluffy pink bear sweatshirtWebDec 29, 2015 · You can see a Chern insulator as a 2D lattice version of the IQHE. (It is also called the Quantum Anomalous Hall Effect). You can go from the trivial phase to the topological phase by changing parameters in the lattice model such as the on-site or hopping energy. greene county tn correctional facilityWebThe 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 greene county tn dmvWebBand 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 … greene county tn early votingWebUniversity of Hong Kong - Cited by 564 - DFT topological insulator/semimetal ... Phononic real Chern insulator with protected corner modes in graphynes. J Zhu, W Wu, J Zhao, C Chen, Q Wang, XL Sheng, L Zhang, YX Zhao, ... Physical Review B 105 (8), 085123, 2024. 6: greene county tn driver\u0027s license officeWebPhononic’s solid state technology and integrated system designs is a transformational approach to cooling, refrigeration and HVAC that makes an impact on greenhouse gas … greene county tn department of health