Gi. Watson et Gs. Canright, FRUSTRATION-INDUCED DISORDER OF FLUX-LINE STRUCTURES IN LAYERED SUPERCONDUCTORS, Physical review. B, Condensed matter, 48(21), 1993, pp. 15950-15956
As an example of a system with competing (frustrated) interactions, we
study a model of the spatial arrangement of flux lines in a layered s
uperconductor, with the magnetic field parallel with the layers, and i
n the limit of strong pinning to the layers. In this approach, we appr
oximate the energy-minimization problem by a discrete nonlinear dynami
cal system, in which a vortex structure is built up one layer at a tim
e. We find a complex variety of metastable states nearly degenerate wi
th the ground state, including lattices with unit cells of many layer
spacings, and disordered structures which correspond to chaotic trajec
tories of the dynamical map. The latter case provides an example of (m
etastable) quenched disorder in a model with no intrinsic randomness.