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Träfflista för sökning "WFRF:(Gustafson Boel) srt2:(2003)"

Sökning: WFRF:(Gustafson Boel) > (2003)

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1.
  • Lind, Erik, et al. (författare)
  • Tunneling spectroscopy of a quantum dot through a single impurity
  • 2003
  • Ingår i: Physical Review B (Condensed Matter and Materials Physics). - 1098-0121. ; 68:3, s. 4-4
  • Tidskriftsartikel (refereegranskat)abstract
    • A single impurity inside a resonant tunneling diode is used to perform tunneling spectroscopy on an adjacent electrostatically defined vertical quantum dot. This results in tunneling between two zero-dimensional systems, measured as a set of sharp peaks in the current-voltage spectrum for finite bias. Magnetic-field-dependent measurements show that the angular momentum of the tunneling electrons is conserved during the tunneling process. Both ground and excited states are probed. The effect of temperature is also investigated, exhibiting a peak broadening that is smaller than 1 kT.
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2.
  • Sass, T, et al. (författare)
  • Strain in GaP/GaAs and GaAs/GaP resonant tunnelling heterostructures
  • 2003
  • Ingår i: Journal of Crystal Growth. - 0022-0248. ; 248, s. 375-379
  • Tidskriftsartikel (refereegranskat)abstract
    • We studied the morphology of GaP/(001)GaAs and GaAs/(001)GaP heterostructures grown by metal-organic vapour-phase epitaxy and found wire-like surface undulations elongated in the [110] direction. We attribute this elongation to anisotropic lateral growth rates in the [110] and [110] directions, which are due to a different roughness of monolayer surface steps. In III-V materials grown by molecular beam epitaxy. such surface corrugations are usually elongated in [110]. We explain this difference by the two growth methods having inverted ratios of lateral growth rates in [110] and [110]. Resonant tunnelling diodes fabricated from the GaP/GaAs heterostructures showed very symmetric I-V characteristics. Their peak-to-valley ratio was limited to 2. most probably due to the corrugation of the GaP barriers. (C) 2002 Elsevier Science B.V. All rights reserved.
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Pietzonka, I (2)
Wernersson, Lars-Eri ... (2)
Gustafson, Boel (2)
Seifert, Werner (1)
Borgström, Magnus (1)
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