Origin of second-harmonic generation in the incommensurate phase of K2SeO4
arXiv:cond-mat/0501714 · doi:10.1103/PhysRevB.70.024102
Abstract
We show that a ferroelectric phase transition takes place in the incommensurate phase of the K2SeO4 crystal. The ferroelectric character of the IC phase explains the second-harmonic generation observed in the corresponding temperature range.
5 pages, 1 figure