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Visar resultat 1 - 5 av 29 uppsatser som matchar ovanstående sökkriterier.

  1. 1. Superconducting gates for InP HEMTs

    Master-uppsats, KTH/Tillämpad fysik

    Författare :Sebastian Alveteg; [2023]
    Nyckelord :Cryogenic electronics; HEMT; Superconductors; Applied Physics; Kryogenisk elektronik; HEMT; Supraledare; Tillämpad fysik;

    Sammanfattning : The thesis examines the prospects of using the superconductor NbN as the gatemetal for an InP HEMT. A HEMT or High Electron Mobility Transistor is aheterostructure transistor engineered to reach very high electron mobility. InPHEMTs are used as cryogenic Low Noise Amplifiers (LNAs), which have increasedin demand as quantum computing is scaling up. LÄS MER

  3. 2. Competing phases of matter: Experimental spectroscopy study of the transition metal dichalcogenides Fe-doped TaS2 and Cu-intercalated TiSe2

    Master-uppsats, Uppsala universitet/Institutionen för fysik och astronomi

    Författare :Christian Stefan Gruber; [2023]
    Nyckelord :Condensed matter physics; transition metal dichalcogenides; photoemission spectroscopy;

    Sammanfattning : Syftet med denna avhandling är att bidra till forskningen av befintliga TMD:er (på Engelska transition metal dichalcogenide-TMD) som visar laddningstäthetsvågor och supraledning vid låga temperaturer (som 2H-TaS2). 2H-TaS2 är också känt för att visa supraledning vid 2K. LÄS MER

  4. 3. 2 + 1 Dimensional Chern-Simons Theory for Landau-Ginzburg Theory

    Kandidat-uppsats,

    Författare :Adam Fredriksson; [2023]
    Nyckelord :2 1 dimensional Chern-Simons theory; superconductivity.;

    Sammanfattning : In this work, 2 + 1 dimensional Chern-Simons theory have been used in an attempt to describe superconductivity. It was examined if the two defining properties of superconductivity, infinite direct current (DC) conductivity and the Meissner effect, as well as the two characteristic length scales of superconductors, the London penetration depth and the coherence length, could be obtained. LÄS MER

  5. 4. Towards a Cooper pair splitter in InAs nanowires with crystal-phase defined quantum dots

    Master-uppsats, Lunds universitet/Fasta tillståndets fysik; Lunds universitet/Lunds Tekniska Högskola

    Författare :Louise Olausson; [2022]
    Nyckelord :Cooper pair splitter; quantum dot; nanowire; superconductivity; InAs; crystal-phase; Physics and Astronomy;

    Sammanfattning : Cooper pair splitting (CPS) is a process in which the two spin-entangled electrons of a Cooper pair in a superconductor are split into two spatially separated electrons. If the separated electrons are still entangled, CPS can be studied to increase the knowledge of non-locality in quantum systems. LÄS MER

  7. 5. Quasicrystal nanowires in SNS-junctions

    Master-uppsats, Uppsala universitet/Materialteori

    Författare :Anna Sandberg; [2022]
    Nyckelord :quasicrystal; Fibonacci quasicrystal; superconductivity; SNS-junction; Josephson junction; proximity effect; Josephson current; Bogoliubov-de Gennes method;

    Sammanfattning : Quasicrystals are systems that are ordered but not periodic. They do however still have long-range order and well-defined diffraction peaks. This leads to interesting properties, like critical states which are neither extended nor localized, and to topological invariants and edge states. LÄS MER