Critical behaviour for phase transitions with four-components order parameters
Title:
Critical behaviour for phase transitions with four-components order parameters
Author:
Toledano, J. C. Toledano, P.
Appeared in:
Ferroelectrics
Paging:
Volume 54 (1984) nr. 1 pages 39-42
Year:
1984-04-01
Contents:
The renormalization group recursion relations determining fixed points in the S`-expansion, have been solved for all effective hamiltonians associated to n=4 order parameters. A single new fixed point has been found, possessing an icosahedral symmetry. Though for all the stable fixed points corresponding to n=4 the fluctuations are anisotropic at the critical point, the critical exponents are, to order S`2, the same as those obtained for isotropic fluctuations This situation results from the fact that for n=4, any stable fixed point coincides, at the order S` with the isotropic fixed point, and is distinct from it only at the order S`2.
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