The nanostructural origin of the ac conductance in dielectric granular metals: the case study of Co_20(ZrO_2)_80

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dc.creatorKonstantinovic, Z
dc.creatordel Muro, M Garcia
dc.creatorBatlle, X
dc.creatorLabarta, A
dc.creatorVarela, M.
dc.date2007-08-16
dc.date.accessioned2026-07-07T08:23:52Z
dc.date.available2026-07-07T08:23:52Z
dc.descriptionWe show which is the nanostructure required in granular Co20(ZrO2)80 thin films to produce an ac response such as the one that is universally observed in a very wide variety of dielectric materials. A bimodal size distribution of Co particles yields randomly competing conductance channels which allow both thermally assisted tunneling through small particles and capacitive conductance among larger particles that are further apart. A model consisting on a simple cubic random resistance-capacitor network describes quantitatively the experimental results as functions of temperature and frequency, and enables the determination of the microscopic parameters controlling the ac response of the samples.
dc.descriptionAvailable online at: http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=APPLAB000091000005052108000001&idtype=cvips&gifs=yes
dc.identifierhttps://arxiv.org/abs/0708.2140
dc.identifierhttp://arxiv.org/abs/0708.2140
dc.identifierAppl. Phys. Lett. 91, 052108 (2007)
dc.identifierdoi:10.1063/1.2766858
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/136152
dc.subjectMaterials Science
dc.subjectDisordered Systems and Neural Networks
dc.titleThe nanostructural origin of the ac conductance in dielectric granular metals: the case study of Co_20(ZrO_2)_80
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