Phase Transitions Microscopic Model

Details Phase Transitions Microscopic Model Phase Transitions Microscopic Model

2004-10-14

arxiv.org/abs/cond-mat/0410359v1

Technical Physics Letters(2005) Volume 31, Issue 6

Physics

Condensed Matter

Statistical Mechanics

6 pages, 2 figures

Scientific paper

The microscopic model in which nodes interacting with each other are statistical systems is introduced. The nodes conditions are connected with a string of distinct microscopic configurations and depend on external parameters (pressure and temperature). In this model the consequent description of first- and second-order phase transitions is carried out and their microscopic level distinctions are analyzed. It is shown that first-order transitions occur when the configuration entropy change at nodes under transitions from dipole-active (low-symmetric) state to symmetric one is more than ln4. Otherwise the second-order transitions take place.

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