Search for dissertations about: "quantum Hall effect"

Showing result 1 - 5 of 37 swedish dissertations containing the words quantum Hall effect.

  2. 1. Quasiparticles in the Quantum Hall Effect

    Author : Janik Kailasvuori; Thors Hans Hansson; Jan Myrheim; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; quantum Hall effect; quasiparticles; noncommutative Chern-Simons theory; nonabelian statistics; thin torus; p-wave superconductivity; topology; index theory; effective gauge fields; Condensed matter physics; Kondenserade materiens fysik;

    Abstract : The fractional quantum Hall effect (FQHE), discovered in 1982 in a two-dimensional electron system, has generated a wealth of successful theory and new concepts in condensed matter physics, but is still not fully understood. The possibility of having nonabelian quasiparticle statistics has recently attracted attention on purely theoretical grounds but also because of its potential applications in topologically protected quantum computing. READ MORE

  4. 2. Quantum Hall devices on epitaxial graphene: towards large-scale integration

    Author : Arseniy Lartsev; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; quantum Hall effect; resistance metrology; epitaxial graphene; quantum Hall array; magnetotransport;

    Abstract : Quantum Hall devices have been used as the primary standard of electrical resistance for over two decades, and they are unlikely to be replaced in this role any time soon. The work presented in this thesis was being done towards the goal of establishing epitaxial graphene on silicon carbide as a new material of choice for these devices. READ MORE

  5. 3. InGaAs Nanowire and Quantum Well Devices

    Author : Lasse Södergren; NanoLund: Centre for Nanoscience; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; nanowire; quantum well; cryogenic; III-V; InGaAs; MOSFET; MOVPE; Hall; mobility; ballistic; RF;

    Abstract : To fulfill the increasing demand for high-speed electronics used for computation or communication is one everlasting challenge for the semiconductor industry. Emerging fields such as quantum computation also has a need for circuits operating at cryogenic temperatures. READ MORE

  6. 4. Effects of future climate on carbon assimilation of boreal Norway spruce

    Author : Marianne Hall; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; bud development; climate change; empirical models; gas exchange; photosynthesis; Picea abies; seasonality; whole-tree chambers;

    Abstract : In boreal forests, the main factors limiting biomass production are the harsh climate, which combines a short growing season and low annual levels of incoming solar energy, and the limited availabilit... mery of nitrogen. READ MORE

  7. 5. Abelian and non-abelian quantum Hall hierarchies

    Author : Yoran Tournois; Maria Hermanns; Kareljan Schoutens; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; fractional quantum hall effect; conformal field theory; Ginzburg-Landau-Chern-Simons; Chern-Simons; wave functions; anyons; fractional statistics; braiding; composite bosons; teoretisk fysik; Theoretical Physics;

    Abstract : A core tenet of condensed matter physics has been that different phases of matter can be classified according to Landau's symmetry breaking paradigm. It has become clear, however, that phases of matter exist that are not distinguished by symmetry, but rather by topology. READ MORE