Quasistatic long-range correlations of Jahn-Teller centers via the phonon field in K2ZnF4: Cu2+ at low temperatures
Eremin M. V., Ivanova T. A., Yablokov Yu. V., Gumerov R. M.
Correlations are discovered between distortions of Jahn-Teller Cu2+ centers in a K2ZnF4 crystal at distances exceeding the range of indirect-exchange interactions.