Topological nodal points in two coupled Su-Schrieffer-Heeger chains [PDF]
, 2017 We study two coupled Su-Schrieffer-Heeger (SSH) chains system, which is shown to contain rich quantum phases associated with topological invariants protected by symmetries.
Ci Li, Sen Lin, Gang Zhang, Zhi Song
semanticscholar +1 more source
Centrosymmetric Li2NaN: a superior topological electronic material with critical-type triply degenerate nodal points [PDF]
Journal of Materials Chemistry C, 2018 Li2NaN is a realistic triply degenerate nodal point material with several superior characteristics.
Lei Jin +5 more
semanticscholar +1 more source
Dynamics of Nodal Points and the Nodal Count on a Family of Quantum Graphs [PDF]
Annales Henri Poincaré, 2011 We investigate the properties of the zeros of the eigenfunctions on quantum graphs (metric graphs with a Schrödinger-type differential operator). Using tools such as scattering approach and eigenvalue interlacing inequalities we derive several formulas relating the number of the zeros of the n-th eigenfunction to the spectrum of the graph and of some ...
Band, Ram +2 more
openaire +3 more sources
From nodal points to non-equidistribution at the Planck scale
Comptes Rendus. Mathématique, 2022 In this note, we make an observation that Laplacian eigenfunctions fail equidistribution at the Planck scale. Furthermore, equidistribution at the same scale also fails around the points where the eigenfunctions have large values.
Han, Xiaolong
doaj +1 more source
Inverse Nodal Problem for Polynomial Pencil of a Sturm-Liouville Operator from Nodal Parameters [PDF]
Mathematics Interdisciplinary Research, 2021 A Sturm-Liouville problem with n-potential functions in the second order differential equation and which contains spectral parameter depending on linearly in one boundary condition is considered.
Sertac Goktas, Esengul Biten
doaj +1 more source
Noncentrosymmetric compensated half-metal hosting pure spin Weyl nodes, triple nodal points, nodal loops, and nexus fermions [PDF]
PHYSICAL REVIEW MATERIALS, 2018 Materials containing multiple topological characteristics become more exotic when combined with noncentrosymmetric crystal structures and unusual magnetic phases such as the compensated half-metal state, which is gapped in one spin direction and ...
Hyo-Sun Jin +3 more
semanticscholar +1 more source
Hidden-symmetry-enforced nexus points of nodal lines in layer-stacked dielectric photonic crystals [PDF]
Light: Science & Applications, 2020 It was recently demonstrated that the connectivities of bands emerging from zero frequency in dielectric photonic crystals are distinct from their electronic counterparts with the same space groups.
Zhongfei Xiong +4 more
semanticscholar +1 more source
Two-dimensional Weyl points and nodal lines in pentagonal materials and their optical response. [PDF]
Nanoscale, 2020 Two-dimensional pentagonal structures based on the Cairo tiling are the basis of a family of layered materials with appealing physical properties. In this work we present a theoretical study of the symmetry-based electronic and optical properties of ...
S. Bravo +4 more
semanticscholar +1 more source
Two-dimensional hourglass Weyl nodal loop in monolayer Pb(ClO2)2 and Sr(ClO2)2
New Journal of Physics, 2022 The hourglass fermions in solid-state materials have been attracting significant interest recently. However, realistic two-dimensional (2D) materials with hourglass-shaped band structures are still very scarce.
Xin-Yue Kang +3 more
doaj +1 more source
Наука. Инновации. Технологии, 2022 Introduction: in the capital-intensive chain, the search for a field, its exploration, production, processing, is a huge field for innovative technologies. An important role belongs to energy resources-oil and gas.
D. V. Lapta, V. M. Kharchenko
doaj