Anomalous elasticity in a disordered layered XY model

Details Anomalous elasticity in a disordered layered XY model Anomalous elasticity in a disordered layered XY model

2012-04-16

arxiv.org/abs/1204.3545v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

6 pages, 4 eps figures included, submitted to the proceedings of FQMT11

Scientific paper

We investigate the effects of layered quenched disorder on the behavior of planar magnets, superfluids, and superconductors by performing large-scale Monte-Carlo simulations of a three-dimensional randomly layered XY model. Our data provide numerical evidence for the recently predicted anomalously elastic (sliding) intermediate phase between the conventional high-temperature and low-temperature phases. In this intermediate phase, the spin-wave stiffness perpendicular to the layers vanishes in the thermodynamic limit while the stiffness parallel to the layers as well as the spontaneous magnetization are nonzero. In addition, the susceptibility displays unconventional finite-size scaling properties. We compare our Monte-Carlo results with the theoretical predictions, and we discuss possible experiments in ultracold atomic gases, layered superconductors and in nanostructures.

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