Kinetic roughening in surfaces of crystals growing on disordered substrates
- 21 September 1992
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 69 (12) , 1773-1776
- https://doi.org/10.1103/physrevlett.69.1773
Abstract
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 nonlinear response. In the presence of the Kardar-Parisi-Zhang nonlinearity the disorder causes the lattice effects to decay on large scales with an intermediate crossover behavior. The mobility of the rough surface has a complex dependence on the temperature and the other physical parameters.Keywords
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