920 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- National Academy of Sciences of UkraineUA354 papers
- Lviv UniversityUA86 papers
- Coventry UniversityGB63 papers
- Lviv Polytechnic National UniversityUA61 papers
- Johannes Kepler University of LinzAT57 papers
- Centre National de la Recherche ScientifiqueFR55 papers
- Otto-von-Guericke-Universität MagdeburgDE42 papers
- University of Pavol Jozef ŠafárikSK27 papers
- Université de LorraineFR26 papers
- Georgetown UniversityUS21 papers
- Max Planck Institute for the Physics of Complex SystemsDE20 papers
- Institute of Physical ChemistryPL16 papers
27 papers · 1 filter
Microscopic model of phase transition in the crystals of DMAAlS and DMAGaS type
I. V. Stasyuk, O. V. Velychko
The four-state model is proposed for description of phase transition in ferroelectric crystals of DMAGaS and DMAAlS type. Thermodynamical functions of the model are obtained in the…
Dynamical susceptibilities in strong coupling approach
A. M. Shvaika
A general scheme to calculate dynamical susceptibilities of strongly correlated electron systems within the dynamical mean field theory is developed. Approach is based on an expans…
Order-disorder model of phase transitions in the DMAGaS-DMAAlS family crystals
I. V. Stasyuk, O. V. Velychko
A four-state model is proposed for description of the sequence of phase transitions in ferroelectric crystals of DMAGaS and DMAAlS type. The ordering processes in the subsystems of…
Strong-coupling approach for strongly correlated electron systems
A. M. Shvaika
A perturbation theory scheme in terms of electron hopping, which is based on the Wick theorem for Hubbard operators, is developed. Diagrammatic series contain single-site vertices…
Colloids with polymer stars: The interaction
Christian von Ferber, Yurij Holovatch, Arben Jusufi +3
We derive the short distance interaction of star polymers in a colloidal solution. We calculate the corresponding force between two stars with arbitrary numbers of legs f_1 and f_2…
Kinetic equation for liquids with a multistep potential of interaction. II: Calculation of transport coefficients
M. V. Tokarchuk, I. P. Omelyan, A. E. Kobryn
We consider a new kinetic equation for systems with a multistep potential of interaction proposed by us recently in Physica A 234 (1996) 89. This potential consists of the hard sph…
A Nonlinear Dynamical System on the Set of Laguerre Entire Functions
Yuri Kozitsky, Lech Wolowski
A nonlinear modification of a parabolic Cauchy problem for entire functions of a single complex variable is considered. The modification means that the time half-line is divided on…
Some Peculiarities of Proton Transport in Quasi-One-Dimensional Hydrogen-Bonded Chains
Natalie Pavlenko
The protonic conductivity in the hydrogen bonded chains is investigated theoretically in the framework of the two-stage transport model. The strong interactions with optical phonon…
The spin-1/2 transverse XX chain with regularly alternating bonds and fields
Oleg Derzhko, Johannes Richter, Oles' Zaburannyi
We use continued fractions for a study of the thermodynamic properties of the periodic nonuniform spin-1/2 isotropic XY chain in a non-random/random (Lorentzian) transverse field.…
Effective and Asymptotic Critical Exponents of Weakly Diluted Quenched Ising Model: 3d Approach Versus -Expansion
R. Folk, Yu. Holovatch, T. Yavors'kii
We present a field-theoretical treatment of the critical behavior of three-dimensional weakly diluted quenched Ising model. To this end we analyse in a replica limit n=0 5-loop ren…
Spin-1/2 periodic nonuniform XX chains and the spin-Peierls instability
O. Derzhko, J. Richter, O. Zaburannyi
Using continued fractions we obtained the exact result for the density of magnon states of the regularly alternating spin-1/2 XX chain with Dzyaloshinskii-Moriya interaction. We ex…
Calculation Method for the Three-Dimensional Ising Ferromagnet Thermodynamics within the Frames of Model
M. P. Kozlovskii, I. V. Pylyuk, V. V. Dukhovii
Calculation of thermodynamic functions of the three-dimensional Ising ferromagnet above and below critical temperature is performed in the approximation of sixfold basis distributi…
Ab initio study of the vapour-liquid critical point of a symmetrical binary fluid mixture
O. V. Patsahan, M. P. Kozlovskii, R. S. Melnyk
A microscopic approach to the investigation of the behaviour of a symmetrical binary fluid mixture in the vicinity of the vapour-liquid critical point is proposed. It is shown that…
Peierls Instabilities in Quasi-One-Dimensional Quantum Double-Well Chains
Natalie Pavlenko
Peierls-type instabilities in quarter-filled () and half-filled () quantum double-well hydrogen-bonded chain are investigated analytically in the framework…
Enskog-Landau kinetic equation for multicomponent mixture. Analytical calculation of transport coefficients
A. E. Kobryn, M. V. Tokarchuk, Y. A. Humenyuk
The Enskog-Landau kinetic equation is considered to describe non-equilibrium processes of a mixture of charged hard spheres. This equation has been obtained in our previous papers…
Transverse wavevector dependent and frequency dependent dielectric function, magnetic permittivity and generalized conductivity of interaction site fluids. MD calculations for the TIP4P water
Igor P. Omelyan
It is shown that the dielectric properties of interaction site models of polar fluids can be investigated in computer experiment using not only the charge fluctuations but also cor…
Longitudinal wavevector- and frequency-dependent dielectric constant of the TIP4P water model
Igor P. Omelyan
A computer adapted theory for self-consistent calculations of the wavevector- and frequency-dependent dielectric constant for interaction site models of polar systems is proposed.…
On the reaction field for interaction site models of polar systems
Igor P. Omelyan
It is rigorously shown that the fluctuation formula, which is used in simulations to calculate the dielectric constant of interaction site models, corresponds to the reaction field…
Ewald summation technique for interaction site models of polar fluids
Igor P. Omelyan
A computer adapted fluctuation formula for the calculation of the wavevector- and frequency-dependent dielectric permittivity for interaction site models of polar fluids within the…
On the numerical integration of motion for rigid polyatomics: The modified quaternion approach
Igor P. Omelyan
A revised version of the quaternion approach for numerical integration of the equations of motion for rigid polyatomic molecules is proposed. The modified approach is based on a fo…
Algorithm for numerical integration of the rigid-body equations of motion
Igor P. Omelyan
A new algorithm for numerical integration of the rigid-body equations of motion is proposed. The algorithm uses the leapfrog scheme and the quantities involved are angular velociti…
A new leapfrog integrator of rotational motion. The revised angular-momentum approach
Igor P. Omelyan
A new algorithm is introduced to integrate the equations of rotational motion. The algorithm is derived within a leapfrog framework and the quantities involved into the integration…
Numerical integration of the equations of motion for rigid polyatomics: The matrix method
Igor P. Omelyan
A new scheme for numerical integration of motion for classical systems composed of rigid polyatomic molecules is proposed. The scheme is based on a matrix representation of the rot…
Normal solution and transport coefficients to the Enskog-Landau kinetic equation for a two-component system of charged hard spheres. The Chapman-Enskog method
A. E. Kobryn, I. P. Omelyan, M. V. Tokarchuk
An Enskog-Landau kinetic equation for a many-component system of charged hard spheres is proposed. It has been obtained from the Liouville equation with modified boundary condition…