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
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
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
Topological excitonic corner states and nodal phase in bilayer quantum spin Hall insulators
Sign Up to like & getrecommendations! Published in 2021 at "Physical Review B"
DOI: 10.1103/physrevb.103.l201115
Abstract: Interaction induced topological states remain one of the fascinating phases in condensed matter physics. The exciton condensate has recently sparked renewed interest due to the discovery of new candidate materials and its driving force to… read more here.
Keywords: bilayer; bilayer quantum; corner states; spin hall ... See more keywords
Multiorbital edge and corner states in black phosphorene
Sign Up to like & getrecommendations! Published in 2021 at "Physical Review B"
DOI: 10.1103/physrevb.104.125302
Abstract: We theoretically study emergent edge/corner localized states in monolayer black phosphorene. Using the tight-binding model based on the density functional theory, we find that the multi-orbital band structure due to the non-planar puckered geometry plays… read more here.
Keywords: corner states; corner; black phosphorene; edge corner ... See more keywords
Tunable Majorana corner states in a two-dimensional second-order topological superconductor induced by magnetic fields
Sign Up to like & getrecommendations! Published in 2018 at "Physical Review B"
DOI: 10.1103/physrevb.97.205134
Abstract: Starting from a minimal model of a time-reversal-invariant topological superconductor in two dimensions, the author shows that an in-plane magnetic field could drive the superconductor into a second-order topological phase, which features Majorana zero modes,… read more here.
Keywords: topological superconductor; second order; corner states; corner ... See more keywords
Direct Observation of Corner States in Second-Order Topological Photonic Crystal Slabs.
Sign Up to like & getrecommendations! Published in 2019 at "Physical review letters"
DOI: 10.1103/physrevlett.122.233902
Abstract: Recently, higher-order topological phases that do not obey the usual bulk-edge correspondence principle have been introduced in electronic insulators and brought into classical systems, featuring in-gap corner or hinge states. In this Letter, using near-field… read more here.
Keywords: order topological; corner states; corner; crystal slabs ... See more keywords