Change in the symmetry of the Fermi surface induced by structural phase transitions in IV-VI semiconductors with a noncentral ion
Dmitriev A. I., Lashkarev G. V., Litvinov V. I. , Gas'kov A. M., Demin V. N.
Electrical and oscillation phenomena in IV-VI semiconductors with a noncentral ion suggest that there are two structural phase transitions which are caused by order-disorder transformations of the dipole system.