When the Landau criterion fails qualitatively
- 1 December 1975
- journal article
- Published by IOP Publishing in Journal of Physics A: General Physics
- Vol. 8 (12) , 1988-1999
- https://doi.org/10.1088/0305-4470/8/12/015
Abstract
The authors show that a theory with an order parameter of one real component, phi , with u3 phi 3 local interaction exhibits-due to fluctuations-a first order phase transition for mod u3 mod >u3c>0, a critical point at u3=u3c, and no transition for mod u3 mod 0. This is in contradiction to the Landau theory which predicts a first order transition for all u3>0. The relation of this failure of Landau's theory to questions of symmetry breaking is discussed.Keywords
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