Effect of second-order piezoelectricity on the excitonic structure of stress-tuned In(Ga)As/GaAs quantum dots

Petr Klenovský, Petr Steindl, Johannes Aberl, Eugenio Zallo, Rinaldo Trotta, Armando Rastelli, and Thomas Fromherz
Phys. Rev. B 97, 245314 – Published 29 June 2018
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Abstract

We study the effects of the nonlinear piezoelectricity and the In distribution on the exciton energy, the electron-hole electric dipole moment, and the fine-structure splitting in stress-tunable In(Ga)As/GaAs quantum dots integrated onto a piezoelectric actuator. In particular, we investigate in detail the contributions of various elements of the expansion of the electrical polarization in terms of externally induced elastic strain on the latter two important quantum dot properties. Based on the comparison of the effects of first- and second-order piezoelectricity we provide a simple relation to estimate the influence of applied anisotropic stress on the quantum dot dipole moment for quantum dots significantly lattice mismatched to the host crystal.

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  • Received 18 May 2018

DOI:https://doi.org/10.1103/PhysRevB.97.245314

©2018 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Petr Klenovský1,2,*, Petr Steindl1,2, Johannes Aberl3, Eugenio Zallo4,5, Rinaldo Trotta3,6, Armando Rastelli3, and Thomas Fromherz3

  • 1Department of Condensed Matter Physics, Faculty of Science, Masaryk University, Kotlářská 267/2, 61137 Brno, Czech Republic
  • 2Central European Institute of Technology, Masaryk University, Kamenice 753/5, 62500 Brno, Czech Republic
  • 3Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz, Altenbergerstraße 69, A-4040 Linz, Austria
  • 4Institute for Integrative Nanosciences, IFW Dresden, Helmholtzstraße 20, D-01069 Dresden, Germany
  • 5Paul-Drude-Institut für Festkörperelektronik, Hausvogteilplatz 5-7, 10117 Berlin, Germany
  • 6Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy

  • *klenovsky@physics.muni.cz

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Issue

Vol. 97, Iss. 24 — 15 June 2018

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