Phononic real chern insulator
WebFractional Chern insulators (FCIs) are lattice analogues of fractional quantum Hall states that may provide a new avenue towards manipulating non-Abelian excitations. Early theoretical studies 1-7 have predicted their existence in systems with flat Chern bands and highlighted the critical role of a particular quantum geometry. WebJan 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. …
Phononic real chern insulator
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WebAlso, recent research progresses on various phononic topological states are reviewed, including phononic Su-Schrieffer-Heeger-like states in 1D, quantum anomalous Hall-like states, quantum valley Hall-like states, and quantum spin Hall-like states in 2D, and phononic Weyl points, nodal lines, and topological insulators in 3D. 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 …
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 … 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.
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 … 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.
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 …
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- cto redstone arsenalWebDec 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, which has internal degrees of freedom forming real representations of a symmetry group with a complex endomorphism field. earth science definition of focusWebUniversity 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: earth science definition of heatWebMar 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. cto regulationsWebThe spin-Chern insulators with even spin-Chern num-bers can be demonstrated through the recently pro-posed toy models [13,14]. In the absence of S z-mixing SOC, these models … cto renewal periodWebFeb 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 … earth science definition transform boundaryWebFeb 24, 2024 · These topologically protected corner states are achieved in a finite-size sample, and the condition for their existence is discussed. Our research extends the … cto report log ontario