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Type: Artigo de periódico
Title: Probing Individual Quantum Dots: Noise In Self-assembled Systems
Author: Vicaro K.O.
Gutierrez H.R.
Seabra A.C.
Schulz P.A.
Cotta M.A.
Abstract: In this work we explore the noise characteristics in lithographically- defined two terminal devices containing self-assembled InAs/lnP quantum dots. The experimental ensemble of InAs dots show random telegraph noise (RTN) with tuneable relative amplitude-up to 150%-in well defined temperature and source-drain applied voltage ranges. Our numerical simulation indicates that the RTN signature correlates with a very low number of quantum dots acting as effective charge storage centres in the structure for a given applied voltage. The modulation in relative amplitude variation can thus be associated to the altered electrostatic potential profile around such centres and enhanced carrier scattering provided by a charged dot. Copyright © 2009 American Scientific Publishers.
Rights: fechado
Identifier DOI: 10.1166/jnn.2009.1308
Date Issue: 2009
Appears in Collections:Unicamp - Artigos e Outros Documentos

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