Sökning: "scanning tunneling microscopy"

Visar resultat 31 - 35 av 70 avhandlingar innehållade orden scanning tunneling microscopy.

  1. 31. STM studies of charge density waves

    Författare :Inger Ekvall; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; tungsten tips; transition metal dichalcogenides; charge density waves; scanning tunneling microscopy spectroscopy;

    Sammanfattning : .... LÄS MER

  3. 32. Fractal superconducting resonators for the interrogation of two-level systems

    Författare :Sebastian Erik de Graaf; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Cooper-pair box; decoherence; electron spin resonance; two-level systems; atomic force microscopy; quasiparticles; near-field scanning microwave microscopy; Superconducting resonators; circuit quantum electrodynamics;

    Sammanfattning : In this thesis we use high-Q superconducting thin-film microwave resonators to interact with several types of quantum mechanical two-level systems. Such a resonator is used as the central building block in a cryogenic near-field scanning microwave microscope (NSMM) to reach a completely new regime of NSMM operation. LÄS MER

  4. 33. Epitaxial Growth, Processing and Characterization of Semiconductor Nanostructures

    Författare :Magnus Borgström; Fasta tillståndets fysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; quantum transport; resonant tunneling diodes; relativity; quantum mechanics; statistical physics; thermodynamics; Matematisk och allmän teoretisk fysik; klassisk mekanik; kvantmekanik; relativitet; gravitation; statistisk fysik; termodynamik; classical mechanics; Mathematical and general theoretical physics; whiskers; ultra high vacuum chemical vapor deposition; RTD; self assembled quantum dots; semiconducting III-V materials; nanowires; metalorganic vapor phase epitaxy; MOVPE; nanostructures; AFM; Atomic force microscopy; InAs; Fysicumarkivet A:2003:Borgström;

    Sammanfattning : This thesis deals with the growth, processing and characterization of nano-sized structures, eg., self-assembled quantum dots and nano-wires. LÄS MER

  5. 34. Magnetic solotronics near the surface of a semiconductor and a topological insulator

    Författare :Mohammad Reza Mahani; C.M. Canali; Biplab Sanyal; Linnéuniversitetet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Magnetic solotronics; Transition metal dopants; Dilute magnetism in semiconductors and topological insulators; Atomistic tight-binding models; DFT; Spin dynamics; Magnetic anisotropy; Scanning tunneling microscope.; Condensed Matter Physics; Kondenserade materians fysik;

    Sammanfattning : Technology where a solitary dopant acts as the active component of an opto-electronic device is an emerging  field known as solotronics, and bears the promise to revolutionize the way in which information is stored, processed and transmitted. Magnetic doped semiconductors and in particular (Ga, Mn)As, the archetype of dilute magnetic semiconductors, and topological insulators (TIs), a new phase of quantum matter with unconventional characteristics, are two classes of quantum materials that have the potential to advance spin-electronics technology. LÄS MER

  7. 35. Metal-Organic Complexes at Surfaces

    Författare :Cristina Isvoranu; Synkrotronljusfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; x-ray absorption spectroscopy; x-ray photoelectron spectroscopy; bi-isonicotinic acid; oxalic acid; spin change; gas adsorption; metal-organic complex; iron phthalocyanine; scanning tunneling spectroscopy; resonant photoemission spectroscopy;

    Sammanfattning : The adsorption of different metal-organic complexes at surfaces was investigated by spectroscopic techniques (x-ray photoemission spectroscopy, x-ray absorption spectroscopy, resonant photoemission spectroscopy) and by scanning tunnelling microscopy. The investigation methods are able to provide atomic scale information on the studied systems, which moreover originates from the top-most atomic layers in a sample, meaning that they are surface sensitive techniques. LÄS MER