Sökning: "Topological insulator"

Visar resultat 1 - 5 av 7 uppsatser innehållade orden Topological insulator.

  1. 1. Quantum Transport in Topological Insulator Nanowires

    Master-uppsats, KTH/Fysik

    Författare :Sergi Pradas Rodriguez; [2023]
    Nyckelord :quantum transport; topological insulators; nanowires; numerical analysis; Kwant; etc.; kvanttransport; topologiska isolatorer; nanotrådar; numerisk analys; Kvant; etc.;

    Sammanfattning : Three-dimensional topological insulators are materials that have a bulk band gap like a traditional insulator, but which hold topologically protected conducting surface states. In this thesis we present a numerical analysis of the surface states of topological insulator nanowires in the tight-binding approximation. LÄS MER

  3. 2. Topological Band Theory, An Overview

    Master-uppsats, Göteborgs universitet / Institutionen för fysik

    Författare :Jens Roderus; [2021-06-14]
    Nyckelord :;

    Sammanfattning : Topological insulators, superconductors and semi-metals are states of ma er with unique features such as quantized macroscopic observables and robust, gapless edge states. ese states can not be explained by standard quantum mechanics, but require also the framework of topology to be properly characterized. LÄS MER

  4. 3. Topological properties of flat bands in generalized Kagome lattice materials

    Master-uppsats, KTH/Fysik

    Författare :Daniela Pinto Dias; [2021]
    Nyckelord :tight-binding; topological insulators; flat bands; edge states; honeycomb-Kagome lattice; tätt bindande modell; topologiska isolatorer; platta band; kanttillstånder; bikakan-Kagome gitter;

    Sammanfattning : Topological insulators are electronic materials that behave like an ordinary insulator in their bulk but have robust conducting states on their edge. Besides, in some materials the band structure presents completely flat bands, a special feature leading to strong interactions effects. LÄS MER

  5. 4. Elektrisk styrning av mekaniska vibrationer

    Kandidat-uppsats, Uppsala universitet/Materialteori

    Författare :Carolina Nilsson; [2019]
    Nyckelord :;

    Sammanfattning : In this report a theoretical study have been made in the research field of Materials physics. The system under consideration is based on a similar system from an article. The system consists of a junction between a normal metal and a topological insulator, where one of the materials vibrates. LÄS MER

  7. 5. Band structures of topological crystalline insulators

    Master-uppsats, Karlstads universitet/Institutionen för ingenjörsvetenskap och fysik

    Författare :Elisabet Edvardsson; [2018]
    Nyckelord :Topological insulator; Band structure; Block tridiagonal matrix;

    Sammanfattning : Topological insulators and topological crystalline insulators are materials that have a bulk band structure that is gapped, but that also have toplogically protected non-gapped surface states. This implies that the bulk is insulating, but that the material can conduct electricity on some of its surfaces. LÄS MER