Initial pseudo-steady state & asymptotic KPZ universality in semiconductor on polymer deposition

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...

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Autores principales:	Renan A. L. Almeida, Sukarno O. Ferreira, Isnard Ferraz, Tiago J. Oliveira
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/84858b184568404ab33ac53bcde6ff3e
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spelling	oai:doaj.org-article:84858b184568404ab33ac53bcde6ff3e2021-12-02T16:06:01ZInitial pseudo-steady state & asymptotic KPZ universality in semiconductor on polymer deposition10.1038/s41598-017-03843-12045-2322https://doaj.org/article/84858b184568404ab33ac53bcde6ff3e2017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-03843-1https://doaj.org/toc/2045-2322Abstract 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.Renan A. L. AlmeidaSukarno O. FerreiraIsnard FerrazTiago J. OliveiraNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Renan A. L. Almeida Sukarno O. Ferreira Isnard Ferraz Tiago J. Oliveira Initial pseudo-steady state & asymptotic KPZ universality in semiconductor on polymer deposition
description	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.
format	article
author	Renan A. L. Almeida Sukarno O. Ferreira Isnard Ferraz Tiago J. Oliveira
author_facet	Renan A. L. Almeida Sukarno O. Ferreira Isnard Ferraz Tiago J. Oliveira
author_sort	Renan A. L. Almeida
title	Initial pseudo-steady state & asymptotic KPZ universality in semiconductor on polymer deposition
title_short	Initial pseudo-steady state & asymptotic KPZ universality in semiconductor on polymer deposition
title_full	Initial pseudo-steady state & asymptotic KPZ universality in semiconductor on polymer deposition
title_fullStr	Initial pseudo-steady state & asymptotic KPZ universality in semiconductor on polymer deposition
title_full_unstemmed	Initial pseudo-steady state & asymptotic KPZ universality in semiconductor on polymer deposition
title_sort	initial pseudo-steady state & asymptotic kpz universality in semiconductor on polymer deposition
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/84858b184568404ab33ac53bcde6ff3e
work_keys_str_mv	AT renanalalmeida initialpseudosteadystateasymptotickpzuniversalityinsemiconductoronpolymerdeposition AT sukarnooferreira initialpseudosteadystateasymptotickpzuniversalityinsemiconductoronpolymerdeposition AT isnardferraz initialpseudosteadystateasymptotickpzuniversalityinsemiconductoronpolymerdeposition AT tiagojoliveira initialpseudosteadystateasymptotickpzuniversalityinsemiconductoronpolymerdeposition
_version_	1718385158568017920

Initial pseudo-steady state & asymptotic KPZ universality in semiconductor on polymer deposition

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