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Journal of Physical Studies 7(1), 50–78 (2003)
DOI: https://doi.org/10.30970/jps.07.50 POLARIZATIONAL EFFECTS AND THE CRITICAL BEHAVIOUR OF SYSTEMS WITH COULOMBIC INTERACTIONSV. L. Kulinskii, N. P. Malomuzh
Odessa National University, Department of Theoretical Physics, |
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The review is devoted to the critical behaviour of the systems with Coulombic interactions. The importance of polarizational effects near the critical point in such systems is emphasized. It is shown that polarizational interactions essentially renormalize the initial effective Landau-Ginzburg Hamiltonian of the systems. The dipole fluid model as the basic one for the criticality of ionic liquids (molten salts like NaCl) is considered. It is shown that taking into account the internal degrees of freedom, namely the rotational ones of an ionic pair allows to formulate the new approach to the problem about the physical size of a pair. The estimates for the critical parameters within dipole fluid model are given. Possible scenarios for the criticality of the system with Coulombic interaction are proposed. The possibility of formation of inhomogeneous states in the critical region is discussed. Some specific effects caused by the polarizational induced interaction between order parameter and the charge density fluctuation characteristic for the system with the direct Coulombic interactions are discussed. Some new problems connected with the Coulombic criticality are outlined.
PACS number(s): 05.70.Jk, 64.60.Fr, 64.70.Fx