Sökning: "Magnon"

Visar resultat 1 - 5 av 7 uppsatser innehållade ordet Magnon.

  1. 1. The Pseudo-Unitary Group U(p,q) in Quantum Magnonics

    L3-uppsats, Uppsala universitet/Materialteori

    Författare :Maximilian Meyer-Mölleringhof; [2024]
    Nyckelord :quantum magnonics; materials theory; pseudo-unitary; quantum mechanics; magnons; antiferromagnets;

    Sammanfattning : The study of magnons is an essential part of combining quantum information science and spintronics, allowing for the investigation of quantum properties such as entanglement in solid-state devices. Magnons are commonly described using the theory of T. Holstein and H. LÄS MER

  3. 2. Superluminous magnons in Nickel Oxide

    Master-uppsats, Uppsala universitet/Materialteori

    Författare :Jannes van Poppelen; [2023]
    Nyckelord :;

    Sammanfattning : Recent experiments have shown that the magnon velocity over nanoscale distancesin certain antiferromagnetic materials, with NiO in particular, far exceeds the previous theoretical maximum. Antiferromagnetic insulators are excellent candidatesfor spintronic nanodevices due to their exceptionally low energy dissipation, whichcould benefit the future speed at which information is stored. LÄS MER

  4. 3. Non-Thermal Modeling Of Energy Propagation Carried By Phonons and Magnons

    Kandidat-uppsats,

    Författare :David Dahlgren; Amela Mehic; [2019]
    Nyckelord :phonon; magnon; Boltzmann transport equation; Heat transport; Atom;

    Sammanfattning : Heat transport by phonons and magnons in crystals due to a local perturbation in temperature is described by the Boltzmann transport equation. In this project a one phonon one magnon system was studied in a one dimensional rod with reflective boundaries. Using the splitting algorithm the problem was reduced to a transport and collision term. LÄS MER

  5. 4. The Magnon-Phonon coupling from a microscopic perspective

    Kandidat-uppsats, Uppsala universitet/Materialteori; Uppsala universitet/Institutionen för teknikvetenskaper

    Författare :Niclas Samuelsson; [2019]
    Nyckelord :;

    Sammanfattning : In this project a microscopic description of the magnon-phonon coupling is rederived. This theory is then used to simulate the thermalization process between the spin and lattice system in NiO. It is argued that the Kusuya-LeCraw process (1 mg + 1 ph into 1 mg) cannot be the reason that the phononic and magnonic systems reach a thermal equilibrium. LÄS MER

  7. 5. Magnon-Phonon Coupling

    Master-uppsats, Uppsala universitet/Materialteori

    Författare :Jacob Persson; [2019]
    Nyckelord :Magnon; phonon; coupled; interactions; frequency; spin; lattice; quantization; materials;

    Sammanfattning : Recent experimental and theoretical studies have found evidence of coupled interactions between magnons and phonons. The aim of this study is to construct a model of coupled magnons and phonons, as well as analysing their frequency spectrum. LÄS MER