Zero-temperature criticality in the two-dimensional gauge glass model

Details Zero-temperature criticality in the two-dimensional gauge glass model Zero-temperature criticality in the two-dimensional gauge glass model

2004-12-15

arxiv.org/abs/cond-mat/0412415v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.94.207204

The zero-temperature critical state of the two-dimensional gauge glass model is investigated. It is found that low-energy vortex configurations afford a simple description in terms of gapless, weakly interacting vortex-antivortex pair excitations. A linear dielectric screening calculation is presented in a renormalization group setting that yields a power-law decay of spin-wave stiffness with distance. These properties are in agreement with low-temperature specific heat and spin-glass susceptibility data obtained in large-scale multi-canonical Monte Carlo simulations.

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