Ferroelectric Chirality‐Driven Direction‐Tunable and Spin‐Invertible Corner States in 2D MOF‐Based Magnetic Second‐Order Topological Insulators
Sign Up to like & getrecommendations! Published in 2025 at "Advanced Functional Materials"
DOI: 10.1002/adfm.202505270
Abstract: Despite the rapid progress in predicting 2D magnetic second‐order topological insulators (SOTIs), effective strategies for manipulating their spin‐polarized corner states remain largely unexplored. The interplay between ferroelectricity, chirality, magnetism, and topology presents an untapped opportunity… read more here.
Keywords: magnetic second; corner; corner states; spin ... See more keywords
Multiband Photonic Topological Valley‐Hall Edge Modes and Second‐Order Corner States in Square Lattices
Sign Up to like & getrecommendations! Published in 2021 at "Advanced Optical Materials"
DOI: 10.1002/adom.202001865
Abstract: Robust multiband photonic topological edge states are of great importance for photonic applications, including nonlinear wavelength conversion. In particular, higher‐order photonic topological states provide the realizability of photonic nanoresonators with high robustness against structural disorder… read more here.
Keywords: edge; multiband photonic; photonic topological; second order ... See more keywords
Engineering Second-Order Corner States in 2D Multiferroics.
Sign Up to like & getrecommendations! Published in 2023 at "Small"
DOI: 10.1002/smll.202206574
Abstract: The understanding and manipulate of the second-order corner states are central to both fundamental physics and future topotronics applications. Despite the fact that numerous second-order topological insulators (SOTIs) are achieved, the efficient engineering in a… read more here.
Keywords: corner states; corner; second order; order corner ... See more keywords
Two types of corner states in two-dimensional photonic topological insulators
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Applied Physics"
DOI: 10.1063/5.0039586
Abstract: Higher-order topological insulators, which go beyond the conventional bulk-boundary correspondence, have become a hot research topic in recent years. In this paper, we propose a two dimensional second-order topological photonic crystal based on a C4… read more here.
Keywords: types corner; two dimensional; corner states; topological insulators ... See more keywords
Design of pure and hybrid corner states in all-dielectric second-order photonic topological insulators
Sign Up to like & getrecommendations! Published in 2024 at "Applied Physics Letters"
DOI: 10.1063/5.0197626
Abstract: The groundbreaking discovery of high-order topological insulators has opened the avenues for exploring complex topological states, especially the corner states. Typically, corner states undergo hybridization because of point-group symmetry, leading to degeneracy that has yet… read more here.
Keywords: design pure; corner; pure hybrid; topological insulators ... See more keywords
Topological Corner States due to Boundary Defects
Sign Up to like & getrecommendations! Published in 2025 at "Chinese Physics Letters"
DOI: 10.1088/0256-307x/43/1/010403
Abstract: In conventional higher-order topological insulators (HOTIs), the emergence of topological states can be explained by using the nonzero bulk polarization index. However, corner states emerge in HOTIs with incomplete boundary unit cells (i.e., boundary defects)… read more here.
Keywords: boundary defects; unit; incomplete unit; unit cells ... See more keywords
General bounded corner states in two-dimensional off-diagonal Aubry–André–Harper model with flat bands
Sign Up to like & getrecommendations! Published in 2021 at "New Journal of Physics"
DOI: 10.1088/1367-2630/ac38cc
Abstract: We investigate the general bounded corner states in a two-dimensional off-diagonal Aubry–André–Harper square lattice model supporting flat bands. We show that for certain values of the nearest-neighbor hopping amplitudes, triply degenerate zero-energy flat bands emerge… read more here.
Keywords: flat bands; bounded corner; general bounded; two dimensional ... See more keywords
Topological edge and corner states of valley photonic crystals with zipper-like boundary conditions
Sign Up to like & getrecommendations! Published in 2024 at "Chinese Physics B"
DOI: 10.1088/1674-1056/ad1e6a
Abstract: We present a stable valley photonic crystal (VPC) unit cell with C 3v symmetric quasi-ring-shaped dielectric columns and realize its topological phase transition by breaking mirror symmetry. Based on this unit cell structure, topological edge… read more here.
Keywords: photonic crystals; zipper like; valley photonic; topological edge ... See more keywords
Edge states, corner states, and flat bands in a two-dimensional PT -symmetric system
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review B"
DOI: 10.1103/physrevb.100.125125
Abstract: We study corner states on a flat band in the square lattice. To this end, we introduce a two-dimensional model including Su-Schrieffer-Heeger type bond alternation responsible for corner states as well as next-nearest-neighbor hoppings yielding… read more here.
Keywords: edge states; states flat; system; corner states ... See more keywords
Orbital corner states on breathing kagome lattices
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review B"
DOI: 10.1103/physrevb.101.195143
Abstract: We investigate the higher-order topological insulators on the breathing kagome lattices with $p$-orbital freedom. The bulk topological phase diagram is obtained by calculating the ${Z}_{3}$ Berry phase of the $p$-band model. The existence of a… read more here.
Keywords: breathing kagome; corner states; kagome lattices; lattices orbital ... See more keywords
Kramers pairs of Majorana corner states in a topological insulator bilayer
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review B"
DOI: 10.1103/physrevb.102.195401
Abstract: We consider a system consisting of two tunnel-coupled two-dimensional topological insulators proximitized by a top and bottom superconductor with a phase difference of $\ensuremath{\pi}$ between them. We show that this system exhibits a time-reversal invariant… read more here.
Keywords: kramers pairs; corner states; corner; majorana corner ... See more keywords