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Optimal detrended fluctuation analysis as a tool for the determination of the roughness exponent of the mounded surfaces

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dc.contributor.author Luis, Edwin E. Mozo
dc.contributor.author Assis, Thiago A. de
dc.contributor.author Ferreira, Silvio C.
dc.date.accessioned 2018-04-18T11:59:57Z
dc.date.available 2018-04-18T11:59:57Z
dc.date.issued 2018-02-05
dc.identifier.issn 24700053
dc.identifier.uri https://doi.org/10.1103/PhysRevE.95.042801
dc.identifier.uri http://www.locus.ufv.br/handle/123456789/18779
dc.description.abstract We present an optimal detrended fluctuation analysis (DFA) and applied it to evaluate the local roughness exponent in non-equilibrium surface growth models with mounded morphology. Our method consists in analyzing the height fluctuations computing the shortest distance of each point of the profile to a detrending curved that fits the surface within the investigated interval. We compare the optimal DFA (ODFA) with both the standard DFA and nondetrended analysis. We validate the ODFA method considering a one-dimensional model in the Kardar-Parisi-Zhang universality class starting from a mounded initial condition. We applied the methods to the Clarke-Vvdensky (CV) model in 2 + 1 dimensions with thermally activated surface diffusion and absence of step barriers. It is expected that this model belongs to the nonlinear Molecular Beam Epitaxy (nMBE) universality class. However, an explicit observation of the roughness exponent in agreement with the nMBE class was still missing. The effective roughness exponent obtained with ODFA agrees with the value expected for nMBE class whereas using the other methods it does not. We also characterized the transient anomalous scaling of the CV model and obtained that the corresponding exponent is in agreement with the value reported for other nMBE models with weaker corrections to the scaling. en
dc.format pdf pt-BR
dc.language.iso eng pt-BR
dc.publisher Physical Review E pt-BR
dc.relation.ispartofseries v. 95, Iss. 4, p. 042801, Mar 2017 pt-BR
dc.rights American Physical Society pt-BR
dc.subject Roughness exponent pt-BR
dc.subject Optimal detrended fluctuation pt-BR
dc.title Optimal detrended fluctuation analysis as a tool for the determination of the roughness exponent of the mounded surfaces en
dc.type Artigo pt-BR


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  • Artigos [160]
    Artigos Técnico-científicos na área de Física

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