Essays about: "Quasicrystals"

Found 5 essays containing the word Quasicrystals.

  1. 1. Quasicrystal nanowires in SNS-junctions

    University essay from Uppsala universitet/Materialteori

    Author : Anna Sandberg; [2022]
    Keywords : quasicrystal; Fibonacci quasicrystal; superconductivity; SNS-junction; Josephson junction; proximity effect; Josephson current; Bogoliubov-de Gennes method;

    Abstract : Quasicrystals are systems that are ordered but not periodic. They do however still have long-range order and well-defined diffraction peaks. This leads to interesting properties, like critical states which are neither extended nor localized, and to topological invariants and edge states. READ MORE

  3. 2. Exploratory synthesis and characterisation in the Gd-Au-Si-system : A quest for quasicrystals

    University essay from Uppsala universitet/Institutionen för kemi - Ångström

    Author : Hanna Ohlin; [2017]
    Keywords : quasicrystals; approximants; Gd-Au-Si-system;

    Abstract : The field of crystallography has recently been expanded to include the science of quasicrystals, crystalline structures lacking unit cells and conventional periodicity. This resulted in a paradigm shift in the field, opening up for a whole new branch on the subject of structural chemistry. READ MORE

  4. 3. Quasicrystals : Classification, diffraction and surface studies

    University essay from Karlstads universitet/Institutionen för ingenjörsvetenskap och fysik

    Author : Elisabet Edvardsson; [2015]
    Keywords : quasicrystal; cohomology of groups; reduced lattice; diffraction; X-ray standing waves;

    Abstract : Quasicrystal is the term used for a solid that possesses an essentially discrete diffraction pattern without having translational symmetry. Compared to periodic crystals, this difference in structure gives quasicrystals new properties that make them interesting to study -- both from a mathematical and from a physical point of view. READ MORE

  5. 4. Quantum Mechanical Conduction of Electrons in 1DFibonacci Quasicrystals

    University essay from KTH/Teoretisk fysik

    Author : Carl-Johan Backman; Johannes Wennberg; [2013]
    Keywords : ;

    Abstract : In this report we model and study the propagation of electrons in one-dimensional (1D) Fibonacci quasicrystals. The quasicrystals are modeled with delta function potentials and created by either arranging their strengths or their spacings as a 2 letter Fibonacci word. READ MORE

  6. 5. Growth and XRD Characterization of Quasicrystals in AlCuFe and Nanoflex Thin Films

    University essay from Institutionen för fysik, kemi och biologi

    Author : Simon Olsson; [2008]
    Keywords : Quasicrystals; Approximant; AlCuFe; Nanoflex; Thin Film; Magnetron Sputtering; XRD; EDX;

    Abstract : Quasicrystals is a new kind of material that have several interesting aspects to it. The unusual atomic structure entails many anomalous and unique physical properties, for example, high hardness, and extremely low electrical and thermal conductivity. READ MORE