Conductive atomic force microscopy of InAs/GaAs quantum rings (Articolo in rivista)

Type
Label
  • Conductive atomic force microscopy of InAs/GaAs quantum rings (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Alternative label
  • Mlakar, T; Biasiol, G; Heun, S; Sorba, L; Vijaykumar, T; Kulkarni, GU; Spreafico, V; Prato, S (2008)
    Conductive atomic force microscopy of InAs/GaAs quantum rings
    in Applied physics letters
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Mlakar, T; Biasiol, G; Heun, S; Sorba, L; Vijaykumar, T; Kulkarni, GU; Spreafico, V; Prato, S (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 92 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • \"[Mlakar, Tomaz; Biasiol, Giorgio; Sorba, Lucia] CNR INFM Lab Nazl TASC, I-34012 Trieste, Italy; [Heun, Stefan; Sorba, Lucia] NEST CNR INFM, I-56126 Pisa, Italy; [Heun, Stefan; Sorba, Lucia] Scuola Normale Super Pisa, I-56126 Pisa, Italy; [Vijaykumar, T.; Kulkarni, G. U.] Jawaharlal Nehru Ctr Adv Sci Res, Bangalore 560064, Karnataka, India; [Spreafico, Vittorio; Prato, Stefano] APE Res, I-34012 Trieste, Italy (literal)
Titolo
  • Conductive atomic force microscopy of InAs/GaAs quantum rings (literal)
Abstract
  • The properties of self-assembled InAs/GaAs quantum rings are investigated by conductive atomic force microscopy. Our two-dimensional current maps and current-voltage curves show a lower conductivity of the central ring hole as compared to rim and surrounding planar region. This result is quite surprising if we take into account the compositional profile of quantum rings: being the region with the highest In concentration, one would expect the central hole to be the region with the highest conductivity. However, including the presence of a surface oxide into numerical simulations yields consistent results, which show the same qualitative behavior as the measured conductivities. (C) 2008 American Institute of Physics. (literal)
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