Devil's staircase in kinetically limited growth of Ising model

Details Devil's staircase in kinetically limited growth of Ising model Devil's staircase in kinetically limited growth of Ising model

2002-05-06

arxiv.org/abs/cond-mat/0205102v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

4 pages, PRL submitted

Scientific paper

10.1103/PhysRevE.66.041605

The devil's staircase is a term used to describe surface or an equilibrium phase diagram in which various ordered facets or phases are infinitely closely packed as a function of some model parameter. A classic example is a 1-D Ising model [bak] wherein long-range and short range forces compete, and the periodicity of the gaps between minority species covers all rational values. In many physical cases, crystal growth proceeds by adding surface layers which have the lowest energy, but are then frozen in place. The emerging layered structure is not the thermodynamic ground state, but is uniquely defined by the growth kinetics. It is shown that for such a system, the grown structure tends to the equilibrium ground state via a devil's staircase traversing an infinity of intermediate phases. It would be extremely difficult to deduce the simple growth law based on measurement made on such an grown structure.

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