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Nonlinear response scaling of the two-dimensional XY spin glass in the Coulomb-gas representation

Enzo Granato

cond-mat.stat-mecharXiv:cond-mat/9910075

Abstract

Vortex critical dynamics of the two dimensional XY spin glass is studied by Monte Carlo methods in the Coulomb-gas representation. A scaling analysis of the nonlinear response is used to calculate the correlation length exponent ν of the zero-temperature glass transition. The estimate, ν=1.3(2), is in agreement witth a recent estimate in the phase representation using the same analysis and indicates that the relevant length scale for vortex motion is set by the spin-glass correlation length and that spin and chiralities may order with different correlation length exponents.

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