Landau-level depopulation and high-field magneto-resistance of open quantum dots

R. Akis, A. Ramamoorthy, J. P. Bird, T. Maemoto, D. K. Ferry, M. Inoue

Research output: Contribution to journalArticle

Abstract

We discuss the origin of the Shubnikov-de Haas oscillations (SdHO) that are observed in the magneto-resistance of strongly open quantum dots at magnetic fields where the Lorentz force on the electrons allows them to undergo cyclotron motion within the quantum dot. Similar to the discussion of this effect in two-dimensional electron systems, we find that the properties of the SdHOs in the dots are strongly affected by the presence of disorder, which serves to provide coupling between bulk- and edge-like dot eigenstates. As an example of this behavior, we present the results of studies of the SdHO in InAs open quantum dots.

Original languageEnglish (US)
Pages (from-to)197-201
Number of pages5
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Volume19
Issue number1-2
DOIs
StatePublished - Jul 2003

Fingerprint

Magnetoresistance
Semiconductor quantum dots
quantum dots
Lorentz force
oscillations
Electrons
Cyclotrons
cyclotrons
eigenvectors
electrons
disorders
Magnetic fields
magnetic fields

Keywords

  • Device Modeling
  • Disorder
  • Landau-level
  • Quantum dot
  • Quantum transport

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Landau-level depopulation and high-field magneto-resistance of open quantum dots. / Akis, R.; Ramamoorthy, A.; Bird, J. P.; Maemoto, T.; Ferry, D. K.; Inoue, M.

In: Physica E: Low-Dimensional Systems and Nanostructures, Vol. 19, No. 1-2, 07.2003, p. 197-201.

Research output: Contribution to journalArticle

Akis, R. ; Ramamoorthy, A. ; Bird, J. P. ; Maemoto, T. ; Ferry, D. K. ; Inoue, M. / Landau-level depopulation and high-field magneto-resistance of open quantum dots. In: Physica E: Low-Dimensional Systems and Nanostructures. 2003 ; Vol. 19, No. 1-2. pp. 197-201.
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