Sökning: "Superlattice"

Visar resultat 1 - 5 av 10 uppsatser innehållade ordet Superlattice.

  1. 1. In-situ Growth of Sn-seeded GaAs and GaSb Nanowire Heterostructures

    Master-uppsats, Lunds universitet/Centrum för analys och syntes

    Författare :Azemina Kraina; [2023]
    Nyckelord :nanowire; heterostructure; ETEM; MOCVD; TEM; in-situ; Sn; GaAs; GaSb; materials chemistry; Technology and Engineering; Chemistry;

    Sammanfattning : One of the ways to utilize III-V nanowires, is to make use of the possibility to combine materials and create heterostructures which allows for creating material combinations with new properties. A special interest can be taken into Sb-containing nanowires due to the high electron mobility, however there has been reported difficulties with switching to other materials because of a 'memory effect' where Sb lingers in the system and nanowire. LÄS MER

  3. 2. Hydrogen Absorption in Metal Hydrides : Transmission of light in relation to hydrogen concentration and site occupancy of ultrathin vanadium films

    Kandidat-uppsats, Uppsala universitet/Tillämpad kärnfysik

    Författare :David Sörme; [2022]
    Nyckelord :metal hydrides; iron-vanadium superlattice; hydrogen; hydrogen site occupancy; hydrogen concentrationm; hydrogen storage;

    Sammanfattning : In this study the effect of hydrogenation on the optical properties in the wavelength range 400-1023 nm of an ultrathin iron-vanadium superlattice is investigated. Specifically, mea- surements of transmission are performed under different states of hydrogenation, along with measurements of absolute hydrogen concentration and hydrogen site occupancy. LÄS MER

  4. 3. Investigation of the Magnetic- and Electron Transport Properties of Fe/MgO Superlattices

    Kandidat-uppsats, Uppsala universitet/Materialfysik

    Författare :Ali Rostom; David Holmgren; [2022]
    Nyckelord :Fe MgO superlatice; interlayer exchange coupling; Van der Pauw; electronic transport; magnetic field; resistive properties; 3D memory storage;

    Sammanfattning : Anti-ferromagnetic interlayer exchange coupling between iron layers in Fe/MgO superlatices have recently been of interest among researchers for its potential application in 3D memory storage in computers (hard drives) and in the research field of spintronics. Thinfilms and bi-layers between the 10-100 ångström range in thicknesses were analyzed for its resistive properties during different conditions. LÄS MER

  5. 4. Investigating hydrogen absorption in a Fe/V superlattice using OSFOLD

    L3-uppsats, Uppsala universitet/Tillämpad kärnfysik

    Författare :David Sörme; [2022]
    Nyckelord :;

    Sammanfattning : .... LÄS MER

  7. 5. Topological Photonic Lattices

    Master-uppsats, KTH/Tillämpad fysik

    Författare :Zesheng Xu; [2022]
    Nyckelord :Topological photonics; Integrated photonics; Condensed matter physics physics; Optics; Topologisk fotonik; integrerad fotonik; fysik för kondenserad materia; Optik;

    Sammanfattning : Topological Photonics is a rapidly growing field which explores the ideas of topological invariants adapted from condensed matter physics to optical systems. Thanks to integrated photonics platforms, the evolution of light in nanoscale photonic lattices can enable direct measurement of topological properties of the band-structure. LÄS MER