Kinetic Roughening in Surfaces of Crystals Growing on Disordered Substrates

Details Kinetic Roughening in Surfaces of Crystals Growing on Disordered Substrates Kinetic Roughening in Surfaces of Crystals Growing on Disordered Substrates

1992-09-16

arxiv.org/abs/cond-mat/9209019v1

Phys.Rev.Lett.69:1773-1776,1992; ERRATUM-ibid.69:3420,1992

Physics

Condensed Matter

13 pages, 2 figures (not included). Submitted to Phys. Rev. Letts. Use Latex twice

Scientific paper

10.1103/PhysRevLett.69.1773

Substrate disorder effects on the scaling properties of growing crystalline surfaces in solidification or epitaxial deposition processes are investigated. Within the harmonic approach there is a phase transition into a low-temperature (low-noise) superrough phase with a continuously varying dynamic exponent z>2 and a non-linear response. In the presence of the KPZ nonlinearity the disorder causes the lattice efects to decay on large scales with an intermediate crossover behavior. The mobility of the rough surface hes a complex dependence on the temperature and the other physical parameters.

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