Search for dissertations about: "electrical doping"

Showing result 1 - 5 of 142 swedish dissertations containing the words electrical doping.

  2. 1. Intrinsic tunneling spectroscopy of low-Tc cuprate superconductors : Pseudogap, fluctuations and electrical doping

    Author : Thorsten Jacobs; Vladimir M. Krasnov; Magnus Andersson; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Bi-2201; Bi-2212; low-Tc; cuprates; intrinsic tunneling; transport measurements; pseudogap; fluctuations; electrical doping; Physics; fysik;

    Abstract : In this thesis, intrinsic tunneling and magnetic transport measurements of the cuprate superconductor Bi2+xSr2-yCuO6+δ (Bi-2201) are presented. The compound is characterized by a single-CuO2 plane, has a very low critical temperature Tc ~ 4K and a relatively low upper critical field Hc2 ~ 10T. READ MORE

  4. 2. Unraveling the cuprate superconductor phase diagram : Intrinsic tunneling spectroscopy and electrical doping

    Author : Thorsten Jacobs; Vladimir Krasnov; Dominik Munzar; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Superconductivity; cuprates; intrinsic tunneling spectroscopy; Josephson junctions; mesa structures; micro nanoscale fabrication; electrical doping; pseudogap; Bi-2212; Bi-2201; fysik; Physics;

    Abstract : High-temperature superconductors belong to the group of strongly correlated materials. In these compounds, complex repulsive electron interactions and a large number of degrees of freedom lead to a rich variety of states of matter. READ MORE

  5. 3. Doping of Semiconductor Nanowires

    Author : Jesper Wallentin; Fasta tillståndets fysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; metal-organic vapour phase epitaxy; III-V semiconductor materials; nanowires; doping; solar cells; F:2013:Wallentin;

    Abstract : In this thesis, in situ doping during growth of III-V semiconductor nanowires, primarily for photovoltaic applications, is investigated. The nanowires were grown by metalorganic vapor phase epitaxy (MOVPE), with gold seed particles. READ MORE

  6. 4. Silicon δ-doping and Isoelectronic Doping in GaAs ans GaN Layers Grown by MBE

    Author : Jan Thordson; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; MBE; doping; GaN; III-V; delta-doping; heterostructures; GaAs;

    Abstract : This work concerns MBE-grown material, particularly physical effects due to controlled impurities of Si and N in arsenides, and the growth of nitrides and studies of Al- and As-impurities in them. Apart from interesting physical phenomena there are important device applications. The first part is devoted to studies of Si .delta. READ MORE

  7. 5. Molecular Doping of Epigraphene for Device Applications

    Author : Hans He; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Molecular Doping; Graphene; epitaxial graphene; THz; Metrology; Hall Effect;

    Abstract : Epitaxial graphene grown on silicon carbide, or epigraphene, offers in principle a suitable platform for electronic applications of graphene which require scalable, reproducible, and high-quality material. However, one of the main drawbacks of epigraphene lies in the difficulty in controlling its carrier density, which hinders its usefulness in future applications. READ MORE