Sökning: "electron transport"

Visar resultat 21 - 25 av 79 uppsatser innehållade orden electron transport.

1. 21. Investigations of p-type quantum dots in GaSb nanowires

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

   Författare :In-Pyo Yeo; [2021]
   Nyckelord :Physics and Astronomy;

   Sammanfattning : The purpose of this project is to investigate hole transport in p-type quantum dots formed in GaSb nanowire and operating as single hole transistors. The individual and controlled hole-spin confinement in such system yields a variety of proposed applications for spintronics or quantum computation. LÄS MER

3. 22. Characterization of Secondary Carbides in Low-Alloyed Martensitic Model Alloy Tool Steels

   Master-uppsats, KTH/Materialvetenskap

   Författare :Jubica Jubica; [2020]
   Nyckelord :martensitic steel; secondary hardening; precipitation; STEM; EDS; Prisma; size distribution; martensitiskt stål; sekundärhärdning; utskiljning; STEM; EDS; PRISMA; storleksfördelning;

   Sammanfattning : The development of tool steels for making and shaping other materials requires a better understanding of the material's properties during manufacture. These high-quality steels include many alloying elements, which give increased hardness during tempering. For producing hardened microstructures, austenite generation is essential. LÄS MER

4. 23. Characterization of InAs-Al semiconductor-superconductor hybrid devices

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

   Författare :Markus Aspegren; [2020]
   Nyckelord :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;

   Sammanfattning : 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. LÄS MER

5. 24. Coulomb drag in parallel nanowires

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

   Författare :David Dai; [2020]
   Nyckelord :Coulomb drag; nanowire; Physics and Astronomy;

   Sammanfattning : In this project the transport phenomenon Coulomb drag is studied in a 1D system comprised of two nanowires in parallel. Specifically, a driving current across the active wire generated a drag current in the passive wire, and we studied how Coulomb drag influenced both the driving and drag currents. LÄS MER

7. 25. 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