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

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F13%3A00393333" target="_blank" >RIV/68378271:_____/13:00393333 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1109/TTHZ.2013.2255555" target="_blank" >http://dx.doi.org/10.1109/TTHZ.2013.2255555</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1109/TTHZ.2013.2255555" target="_blank" >10.1109/TTHZ.2013.2255555</a>

Result language

angličtina

Original language name

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

Original language 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 percolatedand 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 effectiveresponse. 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.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BM - Solid-state physics and magnetism

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2013

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

IEEE Transactions on Terahertz Science and Technology

ISSN

2156-342X

e-ISSN

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Volume of the periodical

3

Issue of the periodical within the volume

3

Country of publishing house

US - UNITED STATES

Number of pages

12

Pages from-to

302-313

UT code for WoS article

000318771300012

EID of the result in the Scopus database

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