(1) B. Verkin Institute for Low Temperature Physics and Engineering, 47 Lenin Ave, Kharkov, 61164, Ukraine;(2) Geophysical Laboratory, Carnegie Institution of Washington, 5251 Broad Branch Road NW, Washington, DC, 20015, USA
Abstract:
The mean-field analytical equation for the orientational order parameter of the system of quantum rotors as a function of pressure, temperature and crystal field is derived and analyzed.