Search for dissertations about: "thermopower"

Showing result 1 - 5 of 12 swedish dissertations containing the word thermopower.

  2. 1. Interaction effects in the transport of particles in nanowire quantum dots

    Author : Liney Halla Kristinsdottir; Matematisk fysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Wigner localization; atom transport; electron transport; ultracold dipolar gases; Quantum dots; semiconductor nanowires; current blockade; thermopower; Fysicumarkivet A:2015:Kristinsdottir;

    Abstract : Interactions between physical bodies constantly affect their properties. This thesis presents a theoretical study on the effects of interaction in few-body nanowire quantum dots. READ MORE

  4. 2. Electron transport properties of graphene and graphene field-effect devices studied experimentally

    Author : Youngwoo Nam; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; dual-gated graphene field effect devices; thermopower; quantum Hall effect; graphene; Aharonov-Bohm effect; chemical vapour deposition;

    Abstract : This thesis contains experimental studies on electronic transport properties of graphene with the Aharonov-Bohm (AB) effect, thermopower (TEP) measurements, dual-gated graphene field effect devices, and quantum Hall effect (QHE). Firstly, in an effort to enhance the AB effect in graphene, we place superconducting-metal (aluminium) or normal-metal (gold) mirrors on the graphene rings. READ MORE

  5. 3. Thermoelectric phenomena in low-dimensional semiconductor systems

    Author : Magnus Larsson; Matematisk fysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; kvantmekanik; relativitet; gravitation; statistisk fysik; termodynamik; Semiconductory physics; Halvledarfysik; thermopower anomaly; thermoelectricity; thermionic couple; zone-folding; cool chip; ballistic; thermionic; Mathematical and general theoretical physics; Matematisk och allmän teoretisk fysik; thermodynamics; statistical physics; relativity; quantum mechanics; klassisk mekanik; classical mechanics;

    Abstract : This thesis investigates thermoelectric effects, predominantly in low-dimensional semiconductors. Various novel phenomena are predicted, investigated and discussed. READ MORE

  6. 4. Study the Influence of Quantum Interference on the Electrical Conductance and Thermoelectric Properties of Molecular Junctions : Synthesis and Thermoelectricity

    Author : Hailiang Xu; NanoLund: Centre for Nanoscience; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Molecular junctions; charge transport; electronic conductance; thermoelectricity; destructive quantum interference; acetylene molecules; Sonogashira coupling; Ti-mediated transformation; porphyrin; MacDonald [2 2] approach; [3 1] method;

    Abstract : This thesis mainly describes our efforts towards the study of the quantum interference of electronic conductance and thermoelectric properties in molecular junctions. Chapter 1 introduces the concepts of the charge transport in single-molecule junctions, include the electrical conductivity and thermopower which are the main parameters to assess the efficiency of the single-molecule junctions. READ MORE

  7. 5. Low Temperature Structural and Property investigations in the Zn-Sb System

    Author : Johanna Nylén; Sven Lidin; Jeff Snyder; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Thermoelectrics; Zinc antimmonides; Metal doped semiconductors; Chemistry; Kemi; oorganisk kemi; Inorganic Chemistry;

    Abstract : Thermoelectric Zn4Sb3 has a randomly disordered crystal structure at room temperature and undergoes a reversible sequence of phase transitions, β-α-α’/α, at low temperatures. During the transformations interstitial Zn atoms and Zn vacancies present in the β-phase become increasingly ordered. READ MORE