Use este identificador para citar ou linkar para este item: https://locus.ufv.br//handle/123456789/12231
Tipo: Artigo
Título: Initial pseudo-steady state & asymptotic KPZ universality in semiconductor on polymer deposition
Autor(es): Almeida, Renan A. L.
Ferreira, Sukarno O.
Ferraz, Isnard
Oliveira, Tiago J.
Abstract: The Kardar-Parisi-Zhang (KPZ) class is a paradigmatic example of universality in nonequilibrium phenomena, but clear experimental evidences of asymptotic 2D-KPZ statistics are still very rare, and far less understanding stems from its short-time behavior. We tackle such issues by analyzing surface fluctuations of CdTe films deposited on polymeric substrates, based on a huge spatio-temporal surface sampling acquired through atomic force microscopy. A pseudo-steady state (where average surface roughness and spatial correlations stay constant in time) is observed at initial times, persisting up to deposition of ~104 monolayers. This state results from a fine balance between roughening and smoothening, as supported by a phenomenological growth model. KPZ statistics arises at long times, thoroughly verified by universal exponents, spatial covariance and several distributions. Recent theoretical generalizations of the Family-Vicsek scaling and the emergence of log-normal distributions during interface growth are experimentally confirmed. These results confirm that high vacuum vapor deposition of CdTe constitutes a genuine 2D-KPZ system, and expand our knowledge about possible substrate-induced short-time behaviors.
Palavras-chave: Semiconductor
Polymer deposition
Editor: Scientific Reports
Tipo de Acesso: Open Access
URI: https://doi.org/10.1038/s41598-017-03843-1
http://www.locus.ufv.br/handle/123456789/12231
Data do documento: 19-Jun-2017
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