Sökning: "epitaxy"

Visar resultat 1 - 5 av 31 uppsatser innehållade ordet epitaxy.

  1. 1. Investigation of magnetic order in nickel-5d transition metal systems

    Master-uppsats, Uppsala universitet/Molekyl- och kondenserade materiens fysik

    Författare :Konstantinos Papadopoulos; [2019]
    Nyckelord :muSR; muons; skyrmions; magnetism; transition; spin; rotation; relaxation; resonance; thin; films; transition; metals; MBE; sputtering; XRR; reflectivity; molecular; beam; epitaxy; x; ray; TRIUMF; double; perovskite; longitudinal; transverse; nickel; Ni; asymmetry; positron; depolarization; chiral; lattice; helical; DM; interaction;

    Sammanfattning : Double perovskite materials exhibit alterations in magnetic order through manipulation oftheir crystal structure. Certain ultra thin metallic bilayers can create an exotic magnetic stateof confined spin textures called skyrmions. In both cases, new atomic arrangements leadto new electrical and magnetic properties. LÄS MER

  2. 2. Doped 3C-SiC Towards Solar Cell Applications

    Master-uppsats, Linköpings universitet/Halvledarmaterial

    Författare :Mattias Jons; [2018]
    Nyckelord :Silicon carbide; 3C-SiC; sublimation epitaxy; ohmic contact; photovoltaic; solar cell;

    Sammanfattning : The market for renewable energy sources, and solar cells in particular is growing year by year, as a result there is a large interest in research on new materials and new technologies for solar power applications. In this thesis the photovoltaic properties of cubic silicon carbide (3C-SiC) has been investigated. LÄS MER

  3. 3. Using gallium nitride nanowires as STM probes

    Kandidat-uppsats, Lunds universitet/Synkrotronljusfysik; Lunds universitet/Fysiska institutionen

    Författare :Karolis Sulinskas; [2018]
    Nyckelord :STM; STS; Nanowire; GaN; InAs; Semiconductors; Physics and Astronomy;

    Sammanfattning : Gallium nitride (GaN) nanowires grown using catalyst-free metal organic vapor phase epitaxy were used as scanning tunneling microscope (STM) probes. The probes were prepared by placing a GaN nanowire on a tungsten STM probe using a nanomanipulator in a scanning electron microscope (SEM) and welding them together using an electron beam induced platinum deposition. LÄS MER

  4. 4. Realization of quantum dots emitting at 1.55µm for single photon emitters

    Master-uppsats, KTH/Skolan för informations- och kommunikationsteknik (ICT)

    Författare :Rafaelle Gallo; [2017]
    Nyckelord :;

    Sammanfattning : This thesis reports is about the fabrication and characterization of InAs self-assembled quantum dots (QDs) using both InP and GaAs substrates for the realization of telecommunication-wavelength single-photon sources for quantum communication. The QDs were grown by metal organic vapour phase epitaxy (MOVPE) using the strain-driven Stranski-Krastanov formation mechanism. LÄS MER

  5. 5. Fabrication and characterization of gate last Si MOSFETs with SiGe source and drain

    Master-uppsats, KTH/Skolan för informations- och kommunikationsteknik (ICT)

    Författare :Björn Christensen; [2017]
    Nyckelord :MOSFET fabrication; gate last; SiGe source and drain; IDP gate; epitaxy; MOSFET fabrication; gate last; SiGe source and drain; IDP gate; epitaxy;

    Sammanfattning : The continuous evolution of digital technology we enjoy today is the result of ever shrinking, faster and cheaper transistors that make up the ubiquitous integrated circuits of our devices. Over the decades, the industry has gone from purely geometrical scaling to innovative solutions like high-k dielectrics combined with metal gates and FinFETs. LÄS MER