Study of microcrack nucleation from a blocked twin with the wedge disclination model
Sign Up to like & getrecommendations! Published in 2017 at "Archive of Applied Mechanics"
DOI: 10.1007/s00419-016-1177-x
Abstract: Twinning is an important deformation mechanism of crystalline materials. A deformation twin blocked at the grain boundary may lead to microcrack nucleation and seriously deteriorate the mechanical properties of materials. In this paper, a theoretical… read more here.
Keywords: wedge; nucleation; model; disclination ... See more keywords
A revisit of the elastic fields of straight disclinations with new solutions for a rigid core
Sign Up to like & getrecommendations! Published in 2019 at "Acta Mechanica"
DOI: 10.1007/s00707-019-02411-0
Abstract: The classical solutions for straight disclinations in an infinite elastic solid have been obtained by integrating the results for disclination densities. In this paper, the equilibrium equations are solved directly for straight twist and wedge… read more here.
Keywords: straight disclinations; elastic fields; core; wedge disclination ... See more keywords
Artificial web of disclination lines in nematic liquid crystals
Sign Up to like & getrecommendations! Published in 2017 at "Nature Communications"
DOI: 10.1038/s41467-017-00548-x
Abstract: Disclinations are topological singularities of molecular arrangement in liquid crystals, which typically occur when the average orientation of molecules makes a π rotation along a fictitious closed loop taken inside the liquid crystal. Depending on… read more here.
Keywords: artificial web; disclination lines; web disclination; liquid crystals ... See more keywords
Geometry and mechanics of disclination lines in 3D nematic liquid crystals.
Sign Up to like & getrecommendations! Published in 2021 at "Soft matter"
DOI: 10.1039/d0sm01899f
Abstract: In 3D nematic liquid crystals, disclination lines have a range of geometric structures. Locally, they may resemble +1/2 or -1/2 defects in 2D nematic phases, or they may have 3D twist. Here, we analyze the… read more here.
Keywords: disclination lines; liquid crystals; geometry; disclination ... See more keywords
Properties of the ground state of electronic excitations in carbon-like nanocones
Sign Up to like & getrecommendations! Published in 2018 at "Low Temperature Physics"
DOI: 10.1063/1.5078524
Abstract: On the basis of the continuum model for long-wavelength charge carriers, originating in the tight-binding approximation for the nearest-neighbour interaction of atoms in the crystalline lattice, we consider quantum ground-state effects of electronic excitations in… read more here.
Keywords: state; state electronic; properties ground; electronic excitations ... See more keywords
Breaking planar liquid crystal anchoring to form controllable twist disclination loops
Sign Up to like & getrecommendations! Published in 2017 at "Molecular Crystals and Liquid Crystals"
DOI: 10.1080/15421406.2017.1287486
Abstract: ABSTRACT We have developed a new device called the dynamic cell, whereby the twist angle and cell thickness of a liquid crystal cell can be dynamically varied. For a twist angle larger than 90°, there… read more here.
Keywords: liquid crystal; disclination; breaking planar; twist ... See more keywords
Positive disclination in a thin elastic sheet with boundary.
Sign Up to like & getrecommendations! Published in 2021 at "Physical review. E"
DOI: 10.1103/physreve.104.065002
Abstract: An isolated positive wedge disclination deforms an initially flat elastic sheet into a perfect cone when the sheet is of infinite extent and is elastically inextensible. The latter requires the elastic stretching strains to be… read more here.
Keywords: field; sheet; gaussian curvature; dirac singularity ... See more keywords
Observation of Topological p-Orbital Disclination States in Non-Euclidean Acoustic Metamaterials.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review letters"
DOI: 10.1103/physrevlett.129.154301
Abstract: Disclinations-topological defects ubiquitously existing in various materials-can reveal the intrinsic band topology of the hosting material through the bulk-disclination correspondence. In low-dimensional materials and nanostructure such as graphene and fullerenes, disclinations yield curved surfaces and… read more here.
Keywords: topology; disclination; physics; acoustic metamaterials ... See more keywords
Fractional Disclination Charge and Discrete Shift in the Hofstadter Butterfly.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review letters"
DOI: 10.1103/physrevlett.129.275301
Abstract: In the presence of crystalline symmetries, topological phases of matter acquire a host of invariants leading to nontrivial quantized responses. Here we study a particular invariant, the discrete shift 𝒮, for the square lattice Hofstadter… read more here.
Keywords: disclination; discrete shift; charge; hofstadter ... See more keywords
Nonrelativistic particles in the presence of a Cariñena–Perelomov–Rañada–Santander oscillator and a disclination
Sign Up to like & getrecommendations! Published in 2020 at "International Journal of Modern Physics A"
DOI: 10.1142/s0217751x20500712
Abstract: We examine an elastic medium with a disclination and consider the topological effects in the presence of a nonpolynomial quantum exactly solvable nonlinear oscillator potential related to the isotonic oscillator, and to which we refer… read more here.
Keywords: ena perelomov; cari ena; oscillator; perelomov ada ... See more keywords
Analysis of the interaction of an electron with radial electric fields in the presence of a disclination
Sign Up to like & getrecommendations! Published in 2019 at "International Journal of Geometric Methods in Modern Physics"
DOI: 10.1142/s021988781950172x
Abstract: We consider an elastic medium with a disclination and investigate the topological effects on the interaction of a spinless electron with radial electric fields through the WKB (Wentzel, Kramers, Brillouin) approximation. We show how the… read more here.
Keywords: radial electric; interaction spinless; disclination; electron radial ... See more keywords