Search for dissertations about: "exchange interactions"

Showing result 6 - 10 of 249 swedish dissertations containing the words exchange interactions.

  2. 6. Spin ice and demagnetising theory

    Author : Mikael Twengström; Patrik Henelius; Peter Holdsworth; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Geometrical frustration; spin ice; Monte Carlo simulations; demagnetising theory; special temperatures; Ewald summation; neutron scattering; structure factors; loop algorithms; parallel tempering; frustrated ferromagnets; equilibration issues; long-range interactions; exchange interactions.; Fysik; Physics;

    Abstract : Frustration, or the inability to simultaneously minimise all local interactions is, a phenomenon occurring in a broad number of physical systems. We will in this thesis focus on a class of frustrated ferromagnetic materials called spin ices and how both numerical and experimental techniques can be used to understand their properties. READ MORE

  4. 7. Interactions, initial states, and low-dimensional semiconductors

    Author : Peter Jaksch; Stephanie M. Reimann-Wacker; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Q!uantum mechanical interactions; quantum point contact QPC ; quantum wires; exchange-correlation energy; Reilly model; quantum algorithms; Physics; Fysik;

    Abstract : This thesis is concerned with different aspects of quantum mechanical interactions. The first part of the thesis focuses on their effects in low-dimensional semiconductors; the second part on one of their applications: quantum algorithms, which utilize superpositions created from quantum mechanical interactions. READ MORE

  5. 8. Magnetic moments and exchange interactions in magnetic multilayers

    Author : Björn Skubic; Uppsala universitet; []
    Keywords : ;

    Abstract : .... READ MORE

  6. 9. Momentum exchange between light and nanostructured matter

    Author : Daniel Andrén; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; phase-gradient metasurface; optical force and torque; metavehicle; momentum exchange.; nano-optics; rotary nanomotor; optical tweezers;

    Abstract : An object's translational and rotational motion is associated with linear and angular momenta. When multiple objects interact the exchange of momentum dictates the new system's motion. READ MORE

  7. 10. α-synuclein interactions with lipid membranes

    Author : Katarzyna Makasewicz; NanoLund: Centre for Nanoscience; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; alpha-Synuclein; lipid membranes; protein-lipid interactions; binding cooperativity; membrane remodeling; protei-lipid co-aggregation;

    Abstract : α-synuclein is an intrinsically disordered protein implicated in synaptic vesicle trafficking at the synapse. Accumulation of α-synuclein in the form of amyloid deposits coincides with the loss of dopaminergic neurons in Parkinsons disease. READ MORE