Sökning: "Topological materials"

Visar resultat 1 - 5 av 11 uppsatser innehållade orden Topological materials.

  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. Characterization of Bi-incorporated InSb(111)A/B Surfaces : An STM and XPS Study

    Master-uppsats, Lunds universitet/Synkrotronljusfysik; Lunds universitet/Fysiska institutionen

    Författare :Shengpeng Huang; [2023]
    Nyckelord :indium antimonide; surface reconstructions; bismuth deposition; scanning tunneling microscopy; X-ray photoelectron spectroscopy.; Physics and Astronomy;

    Sammanfattning : In recent years, III-V semiconductor materials have received increasing attention due to their admirable electronic properties like direct tunable bandgaps and high charge carrier mobility. Indium Antimonide (InSb) possesses the largest electron mobility among III-V materials and is promising for infrared detectors, high-speed field effect transistors, and spintronics. 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. Gap properties of helical edge states in two-dimensional topological insulators with time-dependent magnetic impurities

    Master-uppsats, Lunds universitet/Fasta tillståndets fysik; Lunds universitet/Fysiska institutionen

    Författare :Simon Wozny; [2020]
    Nyckelord :topological insulators; edge states; impurities; density of states; Green s function; Floquet; Physics and Astronomy;

    Sammanfattning : The quantum mechanical equivalent of the classical Hall effect can lead to interesting results in solid state physics. A similar effect, that has received attention in recent years, occurs when large spin-orbit coupling is present in a material, the so-called quantum-spin Hall effect. LÄS MER

  7. 5. 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