Search for dissertations about: "Low-dimensional structures"

Showing result 1 - 5 of 50 swedish dissertations containing the words Low-dimensional structures.

  1. 1. Electron Transport in Low Dimensional Systems

    University dissertation from Peter Ramvall, Vattenverksvägen 17D, 21221 Malmö

    Author : Peter Ramvall; Lunds universitet.; Lund University.; [1996]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; high mobility; low-dimensional structures; III-V semiconductors; quantum wells; heterojunctions; quantum Hall effect; edge channels; Shubnikov-de Haas effect; alloy-disorder scattering; Y-branch switch; two dimensional electron gas; Fysik; Fysicumarkivet A:1996:Ramvall; Physics; spin splitting; mag;

    Abstract : Popular Abstract in Swedish Avhandlingen består av transportmätningar på AlGaAs/GaAs och GaInAs/InP heterostrukturer.... READ MORE

  2. 2. Optical Properties of Low Dimensional Semiconductor Materials

    University dissertation from Stockholm : KTH

    Author : Tiantian Han; KTH.; [2008]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Semiconductor; Low dimensional; optics; NATURAL SCIENCES Physics; NATURVETENSKAP Fysik;

    Abstract : This dissertation presents a serial study on optical properties of different semiconductor materials. Three main types of studies are addressed: The role of doping levels of N and Al atoms in the room-temperature photoluminescence (PL) of 4H-SiC films for optoelectronic applications; the use of a basic Monte Carlo method combined with probability calculations of the time-dependent Schroedinger equation to manifest multi-photon absorption and emission of II-VI compound quantum dots (QDs) for bioimaging; a theoretical quantum chemistry approach to study of structure and optical properties of InGaAsN and GaAs clusters for laser technology applications. READ MORE

  3. 3. Nanoelectronic Devices Based on Low-Dimensional Semiconductor Structures

    University dissertation from Stockholm : KTH

    Author : Daniel Wallin; Lunds universitet.; Lund University.; [2008]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; InGaAs InP; GaAs AlGaAs; ballistic transport; quantum transport; low-dimensional structures; two-dimensional electron gas; quantum dot; three terminal ballistic junction; nanowire;

    Abstract : The present thesis reports on results from the fabrication technology development and the corresponding electrical transport measurements of low-dimensional semiconductor structures. The focus of the work has been directed towards two parts: the ballistic transport in nanostructure devices at room temperature, and the development of a charge-sensing technique for quantum dots (QD) in nanowires. READ MORE

  4. 4. Nanomechanical Phenomena in Low-Dimensional Structures

    University dissertation from Chalmers University of Technology

    Author : Anton Vikström; Chalmers tekniska högskola.; Chalmers University of Technology.; [2017]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; surface acoustic waves; solitons; acoustic sensors; heat flow; NEMS; viscoelasticity; electronic edge states; superconductivity;

    Abstract : This is a compilation thesis which investigates various mechanical phenomena in different low-dimensional nanoscale systems. In the first part, we consider a purely mechanical phenomenon: the sensitivity of the dispersion of a Love-type surface acoustic wave (SAW) to geometry and material parameters. READ MORE

  5. 5. Quantum electronic transport in low-dimensional semiconductors

    University dissertation from Solid State Physics, Lund University

    Author : Heiner Linke; Lunds universitet.; Lund University.; [1997]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; quantum transport; two-dimensional electron gas; contact-free characterisation; ballistic transport; mesoscopic; electron billiard; quantum dot; electron-electron interaction; non-linear; phase breaking; Halvledarfysik; Fysicumarkivet A:1997:Linke; non-symmetric conductio; Semiconductory physics; low-dimensional structures;

    Abstract : Electronic transport is studied at low temperatures in two-dimensional electron gases (2DEGs) and in mesoscopic semiconductor microstructures. The method of microwave-detection of the Shubnikov-de Haas effect for the contact-free characterisation of transport properties of 2DEGs is explored using both magnetic-field modulation and light-induced carrier modulation. READ MORE