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• 1

  Article

  Atomic ordering and bond relaxation in optical spectra of self-organized InP/GaInP2 Wigner molecule structures
  

  Author(s):

  A. M. Mintairov, D. V. Lebedev, N. Bert, K. G. Belyaev, V. N. Nevedomskiy, M. V. Rakhlin, A. A. Toropov, A. S. Vlasov, A. Gocalinska, G. Juska, E. Pelucchi, M. A. Arrendondo, A. B. Naden, A. V. Shelaev, V. A. Bykov

  Abstract:

  We used transmission electron microscopy, Raman, and photoluminescence spectroscopy to identify the effect of CuPt-type GaP-InP atomic ordering (AO) on the structural and emission properties of self-organized (SO) InP/GaInP2 Wigner molecule (WM) quantum dot (QD) structures. We found that the correlation of AO and SO growth results in the formation of InP/GaInP2 QD/AO-domain (QD/AOD) core-shell composites. This observation shows that intrinsic WMs in this system emerge due to a strong piezoele…

  Date Published:

  2019-11

  Record Visibility:

  Public

• 2

  Article

  Density Control of InP/GaInP Quantum Dots Grown by Metal-Organic Vapor-Phase Epitaxy
  

  Author(s):

  D. V. Lebedev, N. A. Kalyuzhnyy, S. A. Mintairov, K. G. Belyaev, M. V. Rakhlin, A. A. Toropov, P. Brunkov, A. S. Vlasov, J. Merz, S. Rouvimov, S. Oktyabrsky, M. Yakimov, I. V. Mukhin, A. V. Shelaev, V. A. Bykov, A. Yu. Romanova, P. A. Buryak, A. M. Mintairov

  Abstract:

  We investigated structural and emission properties of self-organized InP/GaInP quantum dots (QD) grown by metal organic chemical vapor deposition using an amount of deposited In from 7 to 2 monolayers (ML). In the uncapped samples, using atomic force microscopy (AFM), we observed lateral sizes of 100–200 nm, together with a bimodal height distribution having maxima at ∼5 and ∼15 nm, which we denoted as QDs of type A and B, respectively; and reduction of the density of the type-B dots from 4.4…

  Date Published:

  2018

  Record Visibility:

  Public