Sökning: "magnetoconductance"

Hittade 3 avhandlingar innehållade ordet magnetoconductance.

  1. 1. Linear and Nonlinear Transport in Quantum Nanostructures

    Författare :Anneli Löfgren; Fasta tillståndets fysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; magnetoconductance; mesoscopic; electron billiard; quantum dot; quantum ratchets; non-linear; symmetries; non-symmetric conduction; rectification; artificial material; Halvledarfysik; Fysicumarkivet A:2002:Löfgren; ballistic transport; quantum transport; 2DEG; Semiconductory physics; InP InGaAs; GaAs AlGaAs;

    Sammanfattning : In this thesis, electron transport in mesoscopic semiconductor nanostructures, in particular so-called electron billiards or quantum dots, is studied. The thesis can be divided into two areas: the linear response regime of transport, and the nonlinear response regime of transport. LÄS MER

  3. 2. Magnetotransport and Persistent Currents in Ballistic Microstructures

    Författare :Thomas Swahn; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : In this Thesis we discuss properties of different ballistic microstructures in the presence of a magnetic field. Three topics have been studied: (i) the magnetoconductance of a three-dimensional (3D) microwire, (ii) magnetotransport and persistent currents in a two-dimensional so called "quantum dot" in a gated AlGaAs heterostructure, and (iii) some magnetotransport properties of a quasi one-dimensional conducting channel in the same kind of material. LÄS MER

  4. 3. Transport Studies of Local-Gate Defined Quantum Dots in Nanowires

    Författare :Carina Fasth; Fasta tillståndets fysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Semiconductory physics; Fysik; Physics; quantum devices; nanowire; quantum dot; Halvledarfysik;

    Sammanfattning : This thesis focuses on electrical transport in semiconductor InAs nanowires grown by chemical beam epitaxy. Initially, transport length scales of homogeneous InAs n-type nanowires are characterized by low-temperature magnetoconductance measurements. The measurements show phase-coherent conductivity corrections. LÄS MER