Search for dissertations about: "High-temperature superconductivity"

Showing result 1 - 5 of 27 swedish dissertations containing the words High-temperature superconductivity.

  1. 1. Phase transitions in high-temperature superconductors

    University dissertation from Stockholm : KTH

    Author : Jack Lidmar; KTH.; [1998]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Superconductivity; Vortices; Phase transitions; Strongly correlated fermions; High-temperature superconductivity; Monte Carlo simulations.; TECHNOLOGY; TEKNIKVETENSKAP;

    Abstract : Thermal fluctuations and disorder strongly influence the behaviour of hightemperature superconductors. In particular the vortices play a key role in determining their properties. In this thesis the main focus lies on phase transitions, both in ultra-thin films and in three-dimensional systems, which are driven by vortex fluctuations. READ MORE

  2. 2. Ordering and phase transitions in models of high temperature superconductors

    University dissertation from Stockholm : KTH

    Author : Jack Lidmar; KTH.; [1997]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; superconductivity; vortices; phase transitions; strongly correlated fermions; high temperature superconductivity; TECHNOLOGY; TEKNIKVETENSKAP;

    Abstract : .... READ MORE

  3. 3. Quantum dynamics of spin active and d-wave Josephson junctions

    University dissertation from Stockholm : KTH

    Author : Jens Harro Michelsen; [2010]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Josephson effect; macroscopic quantum tunneling; high-temperature superconducvity; superconducting junctions; spin-active junctions; nonequilibrium superconductivity; Andreev bound states;

    Abstract : Conventional tunnel Josephson junctions form the basic building blocks of superconducting electronics. Their operation is based on comparatively simple dynamics where the superconducting phases across the junctions is the only dynamical degree of freedom. READ MORE

  4. 4. The paramagnetic Meissner effect

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Evie Papadopoulou; Uppsala universitet.; [2001]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials science; high-temperature superconductivity; Bi-based compounds; paramagnetic Meissner effect; ageing; disordered magnets; chiral-glass; Materialvetenskap; TECHNOLOGY Materials science; TEKNIKVETENSKAP Teknisk materialvetenskap; Solid State Physics; fasta tillståndets fysik;

    Abstract : The low field dynamics of some high temperature superconductors have been studied experimentally, using SQUID magnetometry.The research has been focused on the so called Paramagnetic Meissner Effect (PME), a phenomenon seen in some high temperature superconducting cuprates. READ MORE

  5. 5. Properties of small Bi2Sr2CaCu2O8 intrinsic Josephson junctions: confinement, flux-flow and resonant phenomena

    University dissertation from Stockholm : Department of Physics, Stockholm University

    Author : Sven-Olof Katterwe; Stockholms universitet.; [2011]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; high-temperature superconductivity; intrinsic Josephson junctions; tunneling; fluxons; flux-flow oscillator; THz-emission; cavity resonances; polaritons; micro nano-fabrication; fysik; Physics;

    Abstract : In this thesis, intrinsic Josephson junctions, naturally formed in the strongly anisotropic high-temperature superconductor Bi2Sr2CaCu2O8 (Bi-2212), are studied experimentally. For this purpose, small mesa structures are fabricated on the surface of single crystals using micro- and nano-fabrication tools, focused ion beam is used to reduce the area of the mesa-structures down to ≈ 1 × 1 μm2. READ MORE