TITLE

Low-frequency negative capacitance effect in systems of metallic nanoparticles embedded in dielectric matrix

AUTHOR(S)
Parravicin, G. B.; Stella, A.; Ungureanu, M. C.; Kofman, R.
PUB. DATE
July 2004
SOURCE
Applied Physics Letters;7/12/2004, Vol. 85 Issue 2, p302
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A negative capacitance (NC) effect in a low-frequency range (4–8×105 Hz), previously shown to take place mainly in semiconductor structures, is evidenced in a nanometric system constituted by metallic (Ga) nanoparticles embedded in an insulating (SiOx with x~1) matrix. The dependence of the NC phenomenon on the time-dependent transient current through the system is evidenced. A remarkable enhancement of the effect with size reduction of the nanoparticles is manifested. The physical mechanism responsible for the current inertia appears to be related to the space charges located at the multiple insulator–metal interfaces.
ACCESSION #
13719734

 

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