Search for dissertations about: "Low-dimensional structures"

Showing result 6 - 10 of 61 swedish dissertations containing the words Low-dimensional structures.

  2. 6. Zeeman Interaction in Low-Dimensional III-V Semiconductor Structures

    Author : Bernhard Kowalski; Fasta tillståndets fysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; optically detected spin resonance; spin resonance; effective g-value; III-V semiconductors; low-dimensional structures; quantum wells; quantum dots; Stranski-Krastanow; photoluminescence; GaInAs; single dot Magneto-luminescence; Fysicumarkivet A:1997:Kowalski; Halvledarfysik; Semiconductory physics; GaInAs-InP;

    Abstract : The Zeeman interaction in low-dimensional III-V semiconductor nanostructures is studied. The effective g-value of bulk InGaAs is measured by two different spin resonance techniques. Experimental conditions were found to control the Overhauser effect, thus enabling a highly accurate determination of the g-value, g* = -4.070 ± 0. READ MORE

  4. 7. Nanomechanical Phenomena in Low-Dimensional Structures

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

    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. 8. MOVPE Growth and Characterization of Low-Dimensional III-V Semiconductor Structures

    Author : Niclas Carlsson; Fasta tillståndets fysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Semiconductory physics; low-dimensional structures; metalorganic vapour phase epitaxy; quantum wells; self-assembled dots; quantum dots; Fysicumarkivet A:1998:Carlsson; Halvledarfysik;

    Abstract : Metalorganic vapour phase epitaxy is used for growth of low-dimensional III-V semiconductor structures. The roughness of heterointerfaces in GaAs/GaInP quantum well structures is studied by photoluminescence emission from extremely narrow quantum wells. READ MORE

  6. 9. A new synthetic strategy for low-dimensional compounds : Lone pair cations and alkaline earth spacers

    Author : Rie Takagi Fredrickson; Mats Johnsson; Sven Lidin; Lars Kloo; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Alkaline earth; Lone pair elements; Low-dimensional compounds; Inorganic chemistry; Oorganisk kemi; oorganisk kemi; Inorganic Chemistry;

    Abstract : Complex transition metals oxyhalides containing a lone pair element, such as tellurium (IV), form an attractive research field because there is a high probability of finding new low-dimensionally arranged compounds and, particularly, a low-dimensionally arranged transition metals substructures, leading to interesting physical properties. Tellurium (IV) can drive the formation of many unusual structures because of its stereochemically active lone pair electrons, E. READ MORE

  7. 10. "Chemical scissors" - a shortcut to the low-dimensional world

    Author : Zuzana Hugonin; Sven Lidin; P. Shiv Halasyamani; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Lone-pair of electrons; Low-dimensional compounds; Antimony oxo-halides; Inorganic chemistry; Oorganisk kemi; oorganisk kemi; Inorganic Chemistry;

    Abstract : A number of oxo-halide compounds have been prepared and studied. The antimony Sb3+ cation shows great flexibility in adopting coordination numbers of three or four, and, since this ion carries a stereochemically active lone-pair of electrons (E), both coordinations are one-sided. READ MORE