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Filling-enforced obstructed atomic insulators

WebSymmetry-enforced chiral hinge states and surface quantum anomalous Hall effect in the magnetic axion insulator Bi 2–x Sm x Se 3. C Yue, Y Xu, Z Song, H Weng, YM Lu, C Fang, X Dai ... Filling-enforced obstructed atomic insulators. Y Xu, L Elcoro, ZD Song, MG Vergniory, C Felser, SSP Parkin, N Regnault, ... arXiv preprint arXiv:2106.10276 ... WebJun 17, 2024 · In this paper, we show that, remarkably, for a subset of the topologically trivial insulators, knowing only their electron number and the Wyckoff positions of the …

(PDF) Orbital Shift‐Induced Boundary Obstructed ... - ResearchGate

WebThe obstructed atomic insulator (OAI) is unique in that it is a topologically nontrivial insulating material, but the band representations deduced from irreducible representations are not... WebMar 19, 2024 · Filling-Enforced Obstructed Atomic Insulators. Yuanfeng Xu, L. Elcoro, +6 authors B. Bernevig; Physics. 2024; Topological band theory has achieved great success in the high-throughput search for topological band structures both in paramagnetic and magnetic crystal materials. However, a significant proportion … fftedit https://kathsbooks.com

Phononic Obstructed Atomic Insulators with Robust Corner Modes

WebIn (f), the highest valence band and the lowest conduction band are separated by a large band gap, and the (100) surface is insulating. On the other hand, the valence and conduction bands on the (001) surface are degenerate at the high-symmetry points, and the (001) surface in (d) is metallic. - "Filling-Enforced Obstructed Atomic Insulators" WebDownload scientific diagram S (green) and ∂ δ S (red) for H SSH from publication: Topological obstructed atomic limit insulators by annihilating Dirac fermions We show that annihilating a ... WebMar 15, 2024 · Figure 9. Sewing the boundaries in a boundary obstructed atomic insulator (e.g., the DMQI quadrupole insulator). When the boundary is stitched along one direction, the filling anomaly is lifted since the two corners contribute with half a charge so that all sites will now have integer filling. fft decimation

(PDF) Filling-Enforced Obstructed Atomic Insulators

Category:Obstructed atomic insulators: A rational strategy to reach two ...

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Filling-enforced obstructed atomic insulators

Filling-enforced quantum band insulators in spin …

WebUsing the theory of topological quantum chemistry, in this work we first derive the necessary and sufficient conditions for a topologically trivial insulator to be a filling enforced … WebJul 6, 2024 · F or instance, obstructed atomic insulators (OAIs) and orbital-selected OAIs (OO AIs) form as results of. the spatial obstruction and representation obstruction, respec-tively [21].

Filling-enforced obstructed atomic insulators

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WebApr 5, 2024 · Massive 1D Dirac Line, Solitons and Reversible Manipulation on the Surface of a Prototype Obstructed Atomic Insulator, Silicon April 2024 DOI: 10.21203/rs.3.rs-2781859/v1 Webcally that in systems with spin-orbit coupling (SOC), there are filling-enforced quantum band insulators (feQBIs) realized at electron fillings nforwhichnoreferenceAIwiththesa …

WebJun 17, 2024 · Remarkably, the filling enforced criteria enable the identification of obstructed atomic bands without knowing the representations of the band structures. Hence, no ab-initio calculations are needed for the filling enforced criteria, although they are needed to obtain the band gaps. WebTopologically trivial insulators come in two kinds: atomic, where the Wannier charge centers (WCCs) are localized on the atoms, and obstructed atomic, where the WCCs are located away from the atoms.

WebTopologically trivial insulators come in two kinds: atomic, where the Wannier charge centers (WCCs) are localized on the atoms, and obstructed atomic, where the WCCs are located away from the atoms. WebApr 8, 2016 · We report the theoretical discovery of band insulators for which electron filling forbids such an atomic description. We refer to them as filling-enforced quantum band …

WebSep 9, 2024 · Abstract: Topological band insulators and (semi-) metals can arise out of atomic insulators when the hopping strength between electrons increases. Such …

WebSep 9, 2024 · The induced insulators inevitably are topologically non-trivial and at least are obstructed atomic insulators (OAIs) that are labeled as trivial insulator in topological quantum chemistry website. Particularly, using silicon as an example, we show ASM criterion can discover the OAIs missed by the recently proposed criterion of filling … fftelecomsWebApr 19, 2024 · The obstructed atomic insulator (OAI) is unique in that it is a topologically nontrivial insulating material, but the band representations deduced from irreducible representations are not derived ... fft deviceWebOur framework can be applied to any symmetry-identifiable band topology, and we demonstrate its applicability to several prominent kinds of three-dimensional band … fftedu twitterWebOct 26, 2024 · Higher-order topological insulators (HOTIs) are described by symmetric exponentially decayed Wannier functions at some unoccupied Wyckoff positions and classified as obstructed atomic insulators (OAIs) in … fft diffractogramWebOct 24, 2024 · According to topological quantum chemistry (TQC), a class of electronic materials has been called obstructed atomic insulators (OAIs), in which a portion of … denny\u0027s on chandler blvdWebNov 8, 2024 · Ferroelectric higher-order topological insulator in two dimensions Ning Mao, 1 Runhan Li, 1 Xiaorong Zou, 1 Ying Dai, 1, ∗ Baibiao Huang, 1 and Chengwang Niu 1, † fft ditheringWebThe interesting group, the OAI, have a center of charge not localized on the atoms. Using the theory of topological quantum chemistry, in this work we first derive the necessary … fft display