Multitip scanning gate microscopy for ballistic transport studies in systems with a two-dimensional electron gas

Kolasinski, K.;Szafran, B.;Hackens, Benoît
(2015) Physical review. B, Condensed matter and materials physics — Vol. 91, n° 20, p. 205314 (2015)

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Authors
  • Kolasinski, K.University of Science and Technology, Krakow, Poland
    Author
  • Szafran, B.University of Science and Technology, Krakow, Poland
    Author
  • Hackens, BenoîtUCLouvain
    Author
Abstract
We consider conductance mapping of systems based on the two-dimensional electron gas with scanning gate microscopy using two or more tips of an atomic force microscope. The paper contains the results of numerical simulations for a model tip potential. In addition, a few procedures are proposed for the extraction and manipulation of ballistic transport properties. In particular, we demonstrate that the multitip techniques can be used to obtain a readout of the Fermi wavelength, to detect potential defects, to filter specific transverse modes, and to tune the system into resonant conditions under which a stable map of the local density of states can be extracted from conductance maps using a third tip.
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Kolasinski, K., Szafran, B., & Hackens, B. (2015). Multitip scanning gate microscopy for ballistic transport studies in systems with a two-dimensional electron gas. Physical review. B, Condensed matter and materials physics, 91(20), 205314. https://doi.org/10.1103/PhysRevB.91.205314 (Original work published 2015)