Figure 1

Spherical polar plots of the magnitude of the polarization (top) and of the piezoelectric field (bottom) in a pseudomorphic InN/GaN quantum well of arbitrary crystallographic orientation. The Euler angles $\theta$ and $\varphi$ give the direction of the growth axis, and at the same time the orientation of the piezoelectric field. The blue and red colors for the field indicate if the field is oriented parallel or antiparallel to the growth direction, respectively. Numerical values along the [0001] direction: polarization (linear/nonlinear) 0.2669/0.1762 C/m${}^2$; electric field (linear/nonlinear) $-$19699/$-$13008 kV/cm.Reuse & Permissions

Figure 2

Piezoelectric polarization with respect to the ternary compositions for different compounds on different (0001) substrates. The curves are P${}_l^{pz}$ (dotted line), P${}_l^{pz}$ with bowing (dashed line), P${}_l^{pz}$ with bowing $+$ P${}_{nl}^{pz}$ (full line).Reuse & Permissions