Estimation of dc transport dynamics in strongly correlated (La,Pr,Ca)MnO3 film using an insulator-metal composite model for terahertz conductivity

Thi Van Anh Nguyen, A. N. Hattori, M. Nagai, T. Nakamura, Kohei Fujiwara, M. Ashida, H. Tanaka

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Temperature-dependent conductivities at dc and terahertz (THz) frequency region (σTHz(Ω,T)) were obtained for a strongly correlated (La0.275Pr0.35Ca0.375)MnO 3 (LPCMO) film using THz time domain spectroscopy. A composite model that describes σTHz(Ω,T) for LPCMO through the insulator-metal transition (IMT) was established by incorporating Austin-Mott model characterizing the hopping of localized electrons and Drude model explaining the behavior of free electrons. This model enables us to reliably investigate the dc transport dynamics from THz conductivity measurement, i.e., simultaneously evaluate the dc conductivity and the competing composition of metal and insulator phases through the IMT, reflecting the changes in microscopic conductivity of these phases.

Original languageEnglish
Article number023502
JournalApplied Physics Letters
Volume105
Issue number2
DOIs
Publication statusPublished - 2014 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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