Double-scaled disorder in Ga(N,As,P)/GaP multiquantum wells

► Temperature dependent spectral dataset of two Ga(N,As,P)/ MQWs with varying composition. ► High resolution TEM study revealing height fluctuations within the triple QWs. ► Two distinct scales of disorder corresponding to two spatial length scales. ► Almost perfect Monte-Carlo simulations of the experimental findings. ► Theoretical explanation of the discovered reduction of disorder with increasing N.