Structure Factor of the 3D Random Field XY Model

Details Structure Factor of the 3D Random Field XY Model Structure Factor of the 3D Random Field XY Model

2007-09-28

arxiv.org/abs/0709.4658v2

Phys. Rev. B 76, 214435 (2007)

Physics

Condensed Matter

Disordered Systems and Neural Networks

12 pages, 3 figures

Scientific paper

10.1103/PhysRevB.76.214435

We have performed Monte Carlo studies of the 3D random field XY model on $L \times L \times L$ simple cubic lattices, with random field strengths of $h_r$ = 1 and 2. We present results for the angle-averaged magnetic structure factor, $S (k)$ at $L = 64$. Our results appear to indicate a phase transition into a ferromagnetic state. This is made possible by the existence of a Griffiths singularity. It appears that at the phase transition $M^2$ jumps to zero discontinuously, with a latent heat which is probably subextensive.

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