Gadekar, S. N. ; Ramakrishnan, T. V. (1980) Theory of weakly first-order transitions in compressible Ising systems Journal of Physics C: Solid State Physics, 13 (32). L957-L961. ISSN 0022-3719
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Official URL: http://iopscience.iop.org/0022-3719/13/32/007
Related URL: http://dx.doi.org/10.1088/0022-3719/13/32/007
Abstract
Compressible Ising systems do not have a second-order phase transition (no fixed points). Using a parquet diagrammatic method, the free energy of the system for non-zero ordering fields is calculated in an approximation that retains the leading fluctuation effects (to order epsilon =4-d). The first-order transition is seen to be fluctuation-induced and order-parameter-limited. The transition parameters are calculated numerically; fairly accurate analytical estimates are presented. The difference with earlier results of Bergmann and Halperin (1976) is pointed out, and application is made to the weakly first-order ferroelectric transition in BaTiO3.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Institute of Physics. |
| ID Code: | 40823 |
| Deposited On: | 25 May 2011 11:01 |
| Last Modified: | 25 May 2011 11:01 |
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