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Charge Transport in Na0.63CoO2 Thin Film Studied by Terahertz Spectroscopy

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Abstract

Charge transport in Na0.63CoO2 thin film was investigated experimentally by time-domain terahertz spectroscopy and theoretically using Monte Carlo calculations of charge response in nano-structured materials. The dominating transport mechanism is a metallic-like conductivity of charges partly confined in constituting nano-grains. The scattering time at low temperatures is limited by scattering by ionized defects and the conductivity is strongly suppressed due to capture of a major fraction of charge carriers in deep traps.

© 2016 Optical Society of America

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