Publikation:

Imaging of light induced carrier transport

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boehm.pdf
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Datum

1999

Autor:innen

Böhm, Andreas

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Titel in einer weiteren Sprache

Bilgebende Darstellung von Transportphänomenen in Festkörpern
Publikationstyp
Dissertation
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Published

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Zusammenfassung

Imaging of carrier transport is possible due to contactless carrier
excitation by means of a small light spot or an electron beam. Besides of
electronic transport these techniques allow in addition to investigate other
material properties. This is due to the photo-thermoelectric excitation
mechanism by illumination and heating. This allows not only the
investigation of (thermo-) electric transport but also the imaging of
phonon, heat and photo-electric transport. The particles can be
distinguished by their reaction upon the application of a magnetic field and
by different detection mechanisms.

Different kinds of materials have been investigated in different crystal
orientations and magnetic field geometries: Such are different types of
metals including superconductors, semiconductors in two-dimensional and
three-dimensional geometry, intercrystalline boundaries and multi-layer
systems. This led to the observation of several new phenomena. Such are
Light Induced Electron Focusing (LIEF) at zero magnetic field, Light Induced
Transverse Electron Focusing (LITEF), Light Induced Longitudinal Electron
Focusing (LILEF), Electron Beam- Induced Electron Focusing (EBIEF),
Light Induced Sondheimer Oscillations (LISO), Light Induced Gurevich
Oscillations (LIGO), Light Induced Magneto-quantum Oscillations (LIMO) and
Light-induces Shubnikov-de Haas oscillations (LISHO). A lot of features have
been simulated numerically and the theoretical work mostly allowed to
reproduce the experimental data.

Zusammenfassung in einer weiteren Sprache

Fachgebiet (DDC)
530 Physik

Schlagwörter

Ballistischer Transport, Thermopower, Elektronen-Fokussierung, ballistic transport, thermopower, electron focussing

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ISO 690BÖHM, Andreas, 1999. Imaging of light induced carrier transport [Dissertation]. Konstanz: University of Konstanz
BibTex
@phdthesis{Bohm1999Imagi-9217,
  year={1999},
  title={Imaging of light induced carrier transport},
  author={Böhm, Andreas},
  address={Konstanz},
  school={Universität Konstanz}
}
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    <dcterms:abstract xml:lang="deu">Imaging of carrier transport is possible due to contactless carrier&lt;br /&gt;excitation by means of a small light spot or an electron beam. Besides of&lt;br /&gt;electronic transport these techniques allow in addition to investigate other&lt;br /&gt;material properties. This is due to the photo-thermoelectric excitation&lt;br /&gt;mechanism by illumination and heating. This allows not only the&lt;br /&gt;investigation of (thermo-) electric transport but also the imaging of&lt;br /&gt;phonon, heat and photo-electric transport. The particles can be&lt;br /&gt;distinguished by their reaction upon the application of a magnetic field and&lt;br /&gt;by different detection mechanisms.&lt;br /&gt;&lt;br /&gt;Different kinds of materials have been investigated in different crystal&lt;br /&gt;orientations and magnetic field geometries: Such are different types of&lt;br /&gt;metals including superconductors, semiconductors in two-dimensional and&lt;br /&gt;three-dimensional geometry, intercrystalline boundaries and multi-layer&lt;br /&gt;systems. This led to the observation of several new phenomena. Such are&lt;br /&gt;Light Induced Electron Focusing (LIEF) at zero magnetic field, Light Induced&lt;br /&gt;Transverse Electron Focusing (LITEF), Light Induced Longitudinal Electron&lt;br /&gt;Focusing (LILEF), Electron Beam- Induced Electron Focusing (EBIEF),&lt;br /&gt;Light Induced Sondheimer Oscillations (LISO), Light Induced Gurevich&lt;br /&gt;Oscillations (LIGO), Light Induced Magneto-quantum Oscillations (LIMO) and&lt;br /&gt;Light-induces Shubnikov-de Haas oscillations (LISHO). A lot of features have&lt;br /&gt;been simulated numerically and the theoretical work mostly allowed to&lt;br /&gt;reproduce the experimental data.</dcterms:abstract>
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Interner Vermerk

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Prüfungsdatum der Dissertation

December 20, 1999
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