Sökning: "insulator"

Visar resultat 21 - 25 av 200 avhandlingar innehållade ordet insulator.

  1. 21. Interactions on the edge of a quantum spin Hall insulator

    Författare :Anders Ström; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
    Nyckelord :topological insulators; quantum spin Hall effect; low-dimensional physics; bosonization; renormalization group;

    Sammanfattning : Effects from electron-electron interactions on the edge of a quantum spin Hall insulator are studied using bosonisation and renormalisation group methods. First, a quantum spin Hall device with a point contact connecting two of its edges is considered. LÄS MER

  2. 22. Cold-Electron Bolometer with Superconductor-Insulator-Normal Metal Tunnel Junctions

    Författare :Ian Jasper Agulo; Chalmers University of Technology; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; temperature sensitivity; cryogenfree; power sensitivity; noise equivalent power; cold-electron bolometer; SIN tunnel junctions; electron cooling;

    Sammanfattning : The Cold-Electron Bolometer (CEB) is an ultrasensitive device designed for the detection of radiation in the terahertz region of the electromagnetic spectrum. The key to its sensitivity is the electron cooling of the absorber by the superconductor-insulator-normal metal (SIN) tunnel junction. LÄS MER

  3. 23. Non-Linear Canonical Methods in Strongly Correlated Electron Systems

    Författare :Matteo Bazzanella; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
    Nyckelord :Majorana fermions; Emergent Majorana fermions; Non-linear transformation; canonical transformation; Kondo lattice; Mott insulator; Mean-field; Path-integral;

    Sammanfattning : In this thesis some new ideas to perform the analysis of Strongly Correlated Electronic Systems (SCES) are developed. In particular the use of non-linear canonical transformations is considered thoroughly. LÄS MER

  4. 24. Electrical Characterization of Novel Insulators in Metal-Insulator-Semiconductor Structures

    Författare :Anders Jauhiainen; Chalmers University of Technology; []
    Nyckelord :silicon dioxide; MOS; Fowler-Nordheim injection; charge transport; MIS; wafer bonding; polycrystalline diamond; capacitance;

    Sammanfattning : This thesis comprises seven papers (A-G) and an extended introduction which puts them into context within a broader field of research. The papers deal with the electrical characterization of some different insulators and interfaces encountered within the realm of silicon based microelectronics. LÄS MER

  5. 25. Graphene spin circuits and spin-orbit phenomena in van der Waals heterostructures with topological insulators

    Författare :Dmitrii Khokhriakov; Chalmers University of Technology; []
    Nyckelord :NATURVETENSKAP; TEKNIK OCH TEKNOLOGIER; NATURAL SCIENCES; ENGINEERING AND TECHNOLOGY; Spin-charge conversion; Van der Waals heterostructures; Graphene; Spintronics; Topological insulator; Proximity effect;

    Sammanfattning : Spintronics offers an alternative approach to conventional charge-based information processing by using the electron spin for next-generation non-volatile memory and logic technologies. To realize such technologies, it is necessary to develop spin-polarized current sources, spin interconnects, charge-to-spin conversion processes, and gate-tunable spintronic functionalities. LÄS MER