About: Charge transport in TiO2 films with complex percolation pathways investigated by time-resolved terahertz spectroscopy

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About: Charge transport in TiO2 films with complex percolation pathways investigated by time-resolved terahertz spectroscopy Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Depolarization fields play an important role in terahertz experiments on nanostructured samples. Namely, their effects hide peculiarities of nanoscopic charge transport in the spectra measured on these structures. We calculate local fields for percolated and non-percolated model structures by numerical solving of Maxwell equations in the quasi-static limit. The results suggest that in a broad family of structures a simple effective medium approximation model can be applied to characterize the effective response. The model consists in an equivalent circuit composed of a resistance accounting for the percolated chains with an additional parallel RC-branch describing the non-percolated part. We show a recipe for the retrieval of a response connected to the depolarization fields and to the nanoscale transport mechanisms from transient terahertz spectra. Finally, we use the model to interpret our THz photoconductivity spectra in various TiO films with nanofabricated percolation pathways. Depolarization fields play an important role in terahertz experiments on nanostructured samples. Namely, their effects hide peculiarities of nanoscopic charge transport in the spectra measured on these structures. We calculate local fields for percolated and non-percolated model structures by numerical solving of Maxwell equations in the quasi-static limit. The results suggest that in a broad family of structures a simple effective medium approximation model can be applied to characterize the effective response. The model consists in an equivalent circuit composed of a resistance accounting for the percolated chains with an additional parallel RC-branch describing the non-percolated part. We show a recipe for the retrieval of a response connected to the depolarization fields and to the nanoscale transport mechanisms from transient terahertz spectra. Finally, we use the model to interpret our THz photoconductivity spectra in various TiO films with nanofabricated percolation pathways. (en)
Title	Charge transport in TiO2 films with complex percolation pathways investigated by time-resolved terahertz spectroscopy Charge transport in TiO2 films with complex percolation pathways investigated by time-resolved terahertz spectroscopy (en)
skos:prefLabel	Charge transport in TiO2 films with complex percolation pathways investigated by time-resolved terahertz spectroscopy Charge transport in TiO2 films with complex percolation pathways investigated by time-resolved terahertz spectroscopy (en)
skos:notation	RIV/68378271:_____/13:00393333!RIV14-GA0-68378271
http://linked.open...avai/predkladatel	Fyzikální ústav AV ČR, v.v.i.
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(GA13-12386S), P(GAP204/12/0232)
http://linked.open...iv/cisloPeriodika	3
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Zajac, Vít Kužel, Petr Mics, Zoltan Němec, Hynek Rychetský, Ivan
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Fyzikální ústav AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	65182
http://linked.open...ai/riv/idVysledku	RIV/68378271:_____/13:00393333
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	terahertz spectroscopy; charge transport; TiO2 nanoparticles (en)
http://linked.open.../riv/klicoveSlovo	terahertz spectroscopy charge transport TiO2 nanoparticles
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[B7E9B10055DC]
http://linked.open...i/riv/nazevZdroje	IEEE Transactions on Terahertz Science and Technology
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	5 (xsd:int)
http://linked.open...cetTvurcuVysledku	8 (xsd:int)
http://linked.open...vavai/riv/projekt	Dielectric and phonon spectroscopy of nanocomposite dielectrics and conductors Fotovodivost a dynamika excitací v nanostrukturovaných a neuspořádaných polovodičích na ultrarychlé časové škále
http://linked.open...UplatneniVysledku	2013
http://linked.open...v/svazekPeriodika	3
http://linked.open...iv/tvurceVysledku	Fattakhova-Rohlfing, D. Kužel, Petr Mics, Zoltan Němec, Hynek Rychetský, Ivan Bein, T. Mandlmeier, B. Zajac, Vít
http://linked.open...ain/vavai/riv/wos	000318771300012
issn	2156-342X
number of pages	12 (xsd:int)
http://bibframe.org/vocab/doi	10.1109/TTHZ.2013.2255555

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