Anomalous Elasticity in a Disordered Layered XY Model
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.
F. Hrahsheh and T. Vojta, "Anomalous Elasticity in a Disordered Layered XY Model," Physica Scripta, vol. 2012, no. T151, Institute of Physics - IOP Publishing, Nov 2012.
The definitive version is available at http://dx.doi.org/10.1088/0031-8949/2012/T151/014074
Keywords and Phrases
Elasticity; Intelligent systems; Stiffness; Superconductivity; Three dimensional computer graphics; Thermodynamics; Superconducting materials; Finite size scaling; High temperature; Intermediate phase; Layered superconductor; Low temperature phasis; Monte Carlo Simulation; Numerical evidence; Quenched disorder; Spontaneous magnetization; Theoretical prediction; Thermodynamic limits; Ultracold atomic gas
International Standard Serial Number (ISSN)
Article - Journal
© 2012 Institute of Physics - IOP Publishing, All rights reserved.