Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/25063

TitleCharge storage behavior of nanostructures based on SiGe nanocrystals embedded in Al2O3 matrix
Author(s)Vieira, E. M. F.
Levichev, S.
Dias, Carlos J.
Igreja, Rui
Buljan, M.
Bernstorff, S.
Conde, Olinda
Chahboun, A.
Rolo, Anabela G.
Gomes, M. J. M.
KeywordsCharge storage
SiGe
Nanocrystals
RF sputtering
Capacitance-voltage
Conductance-voltage
Memory effect
MOS nanostructure
Issue date30-Jul-2013
PublisherSpringer
JournalThe European Physical Journal B
Abstract(s)The charge storage behavior of nanostructures based on Si1−xGex (0 ≤ x ≤ 1) nanocrystals (NCs) in an Al2O3 matrix was investigated. The structures have been grown by RF magnetron sputtering and subsequently annealed at temperatures ranging from 700 ºC to 1000 ºC for 30 min in nitrogen ambient. The stoichiometry of the SiGe NCs and the alumina crystalline structure were found to be significantly dependent on the RF power and the annealing temperature. The sizes of the SiGe NCs and their distribution were investigated by grazing incidence small angle X-ray scattering (GISAXS). The capacitance-voltage (C-V) and conductance-voltage (G-V) measurements were performed to investigate the charge trapping characteristics of the memory structures. The C-V hysteresis width depends on variations in the crystalline structure resulting from different annealing temperatures. It is also shown that charge injection is governed by the Fowler-Nordheim tunnel mechanism for higher electric fields.
TypeArticle
DescriptionThe authors would like to thank Professor David Barber (University of Essex) for his helpful discussions and critical reading of this manuscript, and Engineer José Santos for technical support at Thin Film Laboratory.
URIhttp://hdl.handle.net/1822/25063
DOI10.1140/epjb/e2013-40124-2
ISSN1434-6036
Publisher versionhttp://link.springer.com/article/10.1140%2Fepjb%2Fe2013-40124-2
Peer-Reviewedyes
AccessRestricted access (UMinho)
Appears in Collections:CDF - CEP - Artigos/Papers (with refereeing)

Files in This Item:
File Description SizeFormat 
Charge storage behavior of nanostructures based.pdf
  Restricted access
Documento principal713,22 kBAdobe PDFView/Open    Request a copy!

Partilhe no FacebookPartilhe no TwitterPartilhe no DeliciousPartilhe no LinkedInPartilhe no DiggAdicionar ao Google BookmarksPartilhe no MySpacePartilhe no Orkut
Exporte no formato BibTex mendeley Exporte no formato Endnote Adicione ao seu ORCID