Terahertz?infrared electrodynamics of overdoped manganites La1-xCaxMnO3./sub

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F14%3A00439482" target="_blank" >RIV/68378271:_____/14:00439482 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1080/01411594.2014.953508" target="_blank" >http://dx.doi.org/10.1080/01411594.2014.953508</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1080/01411594.2014.953508" target="_blank" >10.1080/01411594.2014.953508</a>

Result language

angličtina

Original language name

Terahertz?infrared electrodynamics of overdoped manganites La1-xCaxMnO3./sub

Original language description

We have measured low-temperature terahertz and infrared spectra of La1?xCa xMnO3 with x = 0.5; 0.6; 2/3, 0.7; 3/4, 0.85; 0.9; 0.95; 0.98 and x = 1 in the form of ceramics and epitaxial films. In the charge-ordered state for commensurate dopings (x = 2/3and 3/4), we observed an absorption band at frequencies corresponding to the position of the lowest energy van Hove singularity in the folded Brillouin zone. The band is assigned to the boson peak. We observed qualitatively the same boson peak in Raman spectra of La1/3Ca2/3MnO3 ceramics. In antiferromagnetic phase, for the 0.5 x < 0.85 range of doping, the conductivity mechanism gradually changes from a hopping-like transport at low temperatures to the Drude behavior at elevated temperatures in the paramagnetic phase. For 0.85 x < 1 (canted antiferromagnetic phase), the electrons behave as Drude-like carriers in the whole temperature interval 5?300 K.

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

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2014

Confidentiality

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

Name of the periodical

Phase Transitions

ISSN

0141-1594

e-ISSN

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Volume of the periodical

87

Issue of the periodical within the volume

10-11

Country of publishing house

GB - UNITED KINGDOM

Number of pages

10

Pages from-to

1050-1059

UT code for WoS article

000345840100016

EID of the result in the Scopus database

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