Effect of weak disorder in the Fully Frustrated XY model

Details Effect of weak disorder in the Fully Frustrated XY model Effect of weak disorder in the Fully Frustrated XY model

1998-10-08

arxiv.org/abs/cond-mat/9810088v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

8 pages, 4 figures (revtex)

Scientific paper

10.1209/epl/i1998-00497-y

The critical behaviour of the Fully Frustrated XY model in presence of weak positional disorder is studied in a square lattice by Monte Carlo methods. The critical exponent associated to the divergence of the chiral correlation length is found to be equal to 1.7 already at very small values of disorder. Furthermore the helicity modulus jump is found larger than the universal value expected in the XY model.

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