Influences of defects generating random fields on modulated phases in materials with the order-disorder type of phase transition are studied. It is shown that under appropriate conditions third harmonics of the ground state modulation may be suppressed by these defects.
@article{arxiv.1905.12850,
title = {Third Harmonics and Defects in Modulated Phases of Structural Quantum Order-Disorder Systems},
author = {Matej Hudak and Jana Tothova and Tatiana Hudakova and Ondrej Hudak},
journal= {arXiv preprint arXiv:1905.12850},
year = {2019}
}