Semianalytical evaluation of linear and nonlinear piezoelectric potentials for quantum nanostructures with axial symmetry

Jacky Even (1) , François Doré (2) , Charles Cornet (1) , Laurent Pedesseau (3) , Andrei Schliwa (4) , Dieter Bimberg (5)

1 FOTON - Fonctions Optiques pour les Technologies de l'informatiON
2 IPR - Institut de Physique de Rennes
3 ICGM ICMMM - Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier
4 Institut für Festkörperphysik
5 IFKP - Institut für Festkörperphysik

A model is proposed to describe the linear and quadratic piezoelectric potentials in quantum nanostructures with axial symmetry. Semianalytical expressions of the charge densities are given to illustrate the symmetry reduction. The results for InAs/InP quantum dots (QDs) are compared to previous full three-dimensional calculation and to the full isotropic elastic model. The model is well adapted to study various effects for QD: the lattice mismatch, the QD materials composition or alloying, and the QD size or shape. Special emphasis is put on variations of the vertical aspect ratio and the role of the wetting layer.

Domaines: Optique / photonique

Jacky Even, François Doré, Charles Cornet, Laurent Pedesseau, Andrei Schliwa, et al.. Semianalytical evaluation of linear and nonlinear piezoelectric potentials for quantum nanostructures with axial symmetry. Applied Physics Letters, 2007, pp.122112. ⟨10.1063/1.2787894⟩. ⟨hal-00492292⟩