Essays about: "topological surface"

Showing result 6 - 10 of 18 essays containing the words topological surface.

  1. 6. Characterization of InAs-Al semiconductor-superconductor hybrid devices

    University essay from Lunds universitet/Fasta tillståndets fysik; Lunds universitet/Fysiska institutionen

    Author : Markus Aspegren; [2020]
    Keywords : quantum dot; superconductivity; quantum transport; josephson junction; spectroscopy; yu-shiba-rusinov; hybrid devices; sub-gap states; quantum computer; majorana bound state; bogoliubov quasiparticle; Physics and Astronomy;

    Abstract : In this thesis we study charge and spin transport through InAs-Al nanowire superconductor-semiconductor hybrid devices. We focus on assessing the quality of the InAs-Al contact interface when using a weak HCl acid to wet-etch the nanowire surface prior to metal evaporation. READ MORE

  3. 7. An STM-based study of Bi deposition on InAs(110)

    University essay from Lunds universitet/Synkrotronljusfysik; Lunds universitet/Fysiska institutionen

    Author : Tobias Alpskog; [2020]
    Keywords : Bismuth; Deposition; STM; Physics and Astronomy;

    Abstract : III-V semiconductor compounds containing Bi, such as InBi, have recently attracted much attention due to predictions of band inversion and topological insulators. The predictions showed that films of InBi could be applicable in quantum computers and at room temperature. READ MORE

  4. 8. The STM Study of Bi Adsorption on the InAs(111)B Surface

    University essay from Lunds universitet/Synkrotronljusfysik; Lunds universitet/Fysiska institutionen

    Author : Jung-Ching Liu; [2019]
    Keywords : bismuth; indium arsenide 111 B; adsorption; surface; scanning tunneling microscopy; Physics and Astronomy;

    Abstract : Semiconductors composed of group III and group V elements have a variety of promising applications, such as topological insulators and quantum computers. Among this category of semiconductors, bismuth (Bi)-containing III-V compounds are able to make these applications possible. READ MORE

  5. 9. Band structures of topological crystalline insulators

    University essay from Karlstads universitet/Institutionen för ingenjörsvetenskap och fysik

    Author : Elisabet Edvardsson; [2018]
    Keywords : Topological insulator; Band structure; Block tridiagonal matrix;

    Abstract : 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. READ MORE

  6. 10. Axion Electrodynamics and Measurable Effects in Topological Insulators

    University essay from Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)

    Author : Andreas Asker; [2018]
    Keywords : Topological Insulators; Axion Electrodynamics; Topological Magnetoelectric Effect; Topological Field Theory; Faraday-Kerr Effect; Topologiska Isolatorer; Axion Elektrodynamik; Topologiska Magnetoelektriska Effekten; Topologisk Fältteori; Faraday-Kerr Effekten;

    Abstract : Topological insulators are materials with their electronic band structure in bulk resembling that of an ordinary insulator, but the surface states are metallic. These surface states are topologically protected, meaning that they are robust against impurities. READ MORE