Disorder, order, and domain wall roughening in the two-dimensional random field Ising model
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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en
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Physical Review E, Volume 58, issue 5, pp. R5217-5220
Abstract
Ground states and domain walls are investigated with exact combinatorial optimization in two-dimensional random field Ising magnets. The ground states break into domains above a length scale that depends exponentially on the random field strength squared. For weak disorder, this paramagnetic structure has remnant long-range order of the percolation type. The domain walls are super-rough in ordered systems with a roughness exponent ζ close to 6/5. The interfaces exhibit rare fluctuations and multiscaling reminiscent of some models of kinetic roughening and hydrodynamic turbulence.Description
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Seppälä, E T, Petäjä, V & Alava, M J 1998, 'Disorder, order, and domain wall roughening in the two-dimensional random field Ising model', Physical Review E, vol. 58, no. 5, pp. R5217-5220. https://doi.org/10.1103/PhysRevE.58.R5217