arXiv subjects

T. M. Verkholyak

Publications and source records attributed to T. M. Verkholyak.

3 recordsLinked to original sources

arXiv2001

Investigation of ferroelectric order-disorder type compounds with asymmetric double-well potential

The Mitsui model for the order-disorder type ferroelectrics is studied within the mean field approximation. The phase diagram of the model is obtained, its dependence on the transverse field is obtained. A scheme of setting the values of the model parameters is proposed; all the dielectric characteristics of Rochelle salt are calculated with the found parameters. Within the Mitsui model we study the physical characteristics of RbHSO4 type crystals; the found values of the model parameters provide a good description of both dielectric and thermodynamic properties of these compounds.

cond-mat.stat-mech↗

arXiv1997

Spin-1/2 isotropic XY chain with Dzyaloshinskii-Moriya interaction in random lorentzian transverse field

The exact results for thermodynamical properties of one-dimensional spin-1/2 isotropic XY model with Dzyaloshinskii-Moriya interaction in random lorentzian transverse field are obtained. This permits to discuss some approximate methods of disordered spin systems theory. The approximate scheme of examining the thermodynamics of one-dimensional spin-1/2 XXZ Heisenberg model with Dzyaloshinskii-Moriya interaction in random lorentzian field is suggested.

cond-mat.stat-mech↗

arXiv1997

Investigation of the annealed disordered Ising systems within two-tail approximation

In the present paper an approach for investigation of the disordered two-component Ising systems with long range interaction has been suggested. Possible applications to metalic and magnetic alloys and lattice gas are considered. We have also obtained numerical results for thermodynamical properties of these models. The comparison of numerical results obtained within mean field, gaussian field and two-tail approximations are carried out.

cond-mat.stat-mech↗