Deep-Subwavelength Holey Acoustic Second-Order Topological Insulators.
Sign Up to like & getrecommendations! Published in 2019 at "Advanced materials"
DOI: 10.1002/adma.201904682
Abstract: Higher-order topological insulators (HOTIs) belong to a new class of materials with unusual topological phases. They have garnered considerable attention due to their capabilities in confining energy at the hinges and corners, which is entirely… read more here.
Keywords: topological insulators; subwavelength holey; deep subwavelength; order topological ... See more keywords
Kekulé Lattice in Graphdiyne: Coexistence of Phononic and Electronic Second-Order Topological Insulator.
Sign Up to like & getrecommendations! Published in 2022 at "Nano letters"
DOI: 10.1021/acs.nanolett.1c04239
Abstract: Topological physics has been extensively studied in different kinds of bosonic and Fermionic systems, but the coexistence of topological phonons and electrons in one single material has seldom been reported. Recently, graphdiyne has been proposed… read more here.
Keywords: order; topological insulator; electronic second; phononic electronic ... See more keywords
Organic Higher-Order Topological Insulators: Heterotriangulene-Based Covalent Organic Frameworks.
Sign Up to like & getrecommendations! Published in 2022 at "Journal of the American Chemical Society"
DOI: 10.1021/jacs.2c11229
Abstract: The ability to design and control the chemical characteristics of covalent organic frameworks (COFs) offers a new avenue for the development of functional materials, especially with respect to topological properties. Based on density functional theory… read more here.
Keywords: heterotriangulene based; organic frameworks; higher order; order topological ... See more keywords
Higher-order topological semimetal in acoustic crystals
Sign Up to like & getrecommendations! Published in 2021 at "Nature Materials"
DOI: 10.1038/s41563-021-00933-4
Abstract: The notion of higher-order topological insulators has endowed materials with topological states beyond the first order. Particularly, a three-dimensional (3D) higher-order topological insulator can host topologically protected 1D hinge states, referred to as the second-order… read more here.
Keywords: order; higher order; topological semimetal; topological insulator ... See more keywords
Nonlinear second-order photonic topological insulators
Sign Up to like & getrecommendations! Published in 2021 at "Nature Physics"
DOI: 10.1038/s41567-021-01275-3
Abstract: Higher-order topological insulators are a novel topological phase beyond the framework of conventional bulk–boundary correspondence1,2. In these peculiar systems, the topologically non-trivial boundary modes are characterized by a co-dimension of at least two3,4. Despite several… read more here.
Keywords: order; second order; higher order; topological insulators ... See more keywords
Tunable second-order topological insulators in Chern insulators 2H-FeX2 (X = Cl and Br)
Sign Up to like & getrecommendations! Published in 2023 at "Applied Physics Letters"
DOI: 10.1063/5.0151542
Abstract: Engineering topological states in two-dimensional (2D) magnets is of pivotal importance to provide significantly rich physics and application potential. Here, we theoretically demonstrate that the second-order topological insulators (SOTIs) with robust nontrivial corner states can… read more here.
Keywords: physics; topological insulators; order topological; second order ... See more keywords
Strain-engineered higher-order topological phases for spin- 32 Luttinger fermions
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review B"
DOI: 10.1103/physrevb.101.121301
Abstract: Recently, the notion of topological phases of matter has been extended to higher-order incarnations, supporting gapless modes on even lower dimensional boundaries, such as corners and hinges. We here identify a collection of cubic spin-$\frac{3}{2}$… read more here.
Keywords: strain engineered; order topological; order; higher order ... See more keywords
Higher-order topological superconductors in P -, T -odd quadrupolar Dirac materials
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review B"
DOI: 10.1103/physrevb.101.220506
Abstract: The presence or absence of certain symmetries in the normal state (NS) also determines the symmetry of the Cooper pairs. Here, we show that parity ($\mathcal{P}$-) and time-reversal ($\mathcal{T}$-) odd Dirac insulators (trivial or topological)… read more here.
Keywords: order topological; topological superconductors; higher order; dirac ... See more keywords
Floquet second order topological superconductor based on unconventional pairing
Sign Up to like & getrecommendations! Published in 2021 at "Physical Review B"
DOI: 10.1103/physrevb.103.085413
Abstract: We theoretically investigate the Floquet generation of second-order topological superconducting (SOTSC) phase in the high-temperature platform both in two dimension (2D) and three dimension (3D). Starting from a $d$-wave superconducting pairing gap, we periodically kick… read more here.
Keywords: order topological; sotsc phase; energy; phase ... See more keywords
Network model for higher-order topological phases
Sign Up to like & getrecommendations! Published in 2021 at "Physical Review B"
DOI: 10.1103/physrevb.103.115428
Abstract: The network model is a powerful tool in the study of localization-delocalization transitions and has been used to describe a variety of topological systems without crystalline symmetry. Here, the authors show that network models can… read more here.
Keywords: network model; order topological; higher order; topological phases ... See more keywords
Higher-order topological quantum paramagnets
Sign Up to like & getrecommendations! Published in 2022 at "Physical Review B"
DOI: 10.1103/physrevb.105.l020403
Abstract: Quantum paramagnets are strongly-correlated phases of matter where competing interactions frustrate magnetic order down to zero temperature. In certain cases, quantum fluctuations induce instead topological order, supporting, in particular, fractionalized quasi-particle excitations. In this work,… read more here.
Keywords: order topological; order; quantum paramagnets; topological quantum ... See more keywords