Atomic ordering and bond relaxation in optical spectra of self-organized InP/GaInP2 Wigner molecule structures
Mintairov, A. M.; Lebedev, D. V.; Bert, N.; Belyaev, K. G.; Nevedomskiy, V. N.; Rakhlin, M. V.; Toropov, A. A.; Vlasov, A. S.; Gocalinska, Agnieszka; Juska, Gediminas; Pelucchi, Emanuele; Arredondo, M. A.; Naden, A. B.; Shelaev, A. V.; Bykov, V. A.
Date:
2019-11-12
Copyright:
©2019 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http:// creativecommons.org/licenses/by/4.0/
Citation:
Mintairov, A. M., Lebedev, D. V., Bert, N., Belyaev, K. G., Nevedomskiy, V. N., Rakhlin, M. V., Toropov, A. A., Vlasov, A. S., Gocalinska, A., Juska, G., Pelucchi, E., Arredondo, M. A., Naden, A. B., Shelaev, A. V. and Bykov, V. A. (2019) 'Atomic ordering and bond relaxation in optical spectra of self-organized InP/GaInP2 Wigner molecule structures', Applied Physics Letters, 115(20), 202104. (6pp.) doi: 10.1063/1.5126527
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 piezoelectric field generated by AODs, which induces QD doping and a built-in magnetic field. We found that the bond relaxation of AODs leads to a decrease in the emission energy of WMs of 80 meV. The photoluminescence spectra of single WMs having an emission energy ∼1.53 eV are presented here, the lowest one reported for this system.
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Except where otherwise noted, this item's license is described as ©2019 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http:// creativecommons.org/licenses/by/4.0/