Phase transitions in generalized chiral or Stiefel's models

Details Phase transitions in generalized chiral or Stiefel's models Phase transitions in generalized chiral or Stiefel's models

2000-01-11

arxiv.org/abs/cond-mat/0001136v1

Physics

Condensed Matter

Statistical Mechanics

9 pages, 8 figures

Scientific paper

We study the phase transition in generalized chiral or Stiefel's models using Monte Carlo simulations. These models are characterized by a breakdown of symmetry O(N)/O(N-P). We show that the phase transition is clearly first order for N >= 3 when P=N and P=N-1, contrary to predictions based on the Renormalization Group in 4-\epsilon expansion but in agreement with a recent non perturbative Renormalization Group approach.

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