Metal-insulator transition in (Pr, Y)0.7Ca0.3CoO3 in the far-infrared spectral region
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388980%3A_____%2F20%3A00536507" target="_blank" >RIV/61388980:_____/20:00536507 - isvavai.cz</a>
Alternative codes found
RIV/68378271:_____/20:00536507 RIV/00216208:11310/20:10417899
Result on the web
<a href="https://doi.org/10.1103/PhysRevB.102.195105" target="_blank" >https://doi.org/10.1103/PhysRevB.102.195105</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevB.102.195105" target="_blank" >10.1103/PhysRevB.102.195105</a>
Alternative languages
Result language
angličtina
Original language name
Metal-insulator transition in (Pr, Y)0.7Ca0.3CoO3 in the far-infrared spectral region
Original language description
Bulk ceramics and thick nanogranular films of mixed-valence cobaltite (Pr1−yYy)0.7Ca0.3CoO3 were studied using time-domain THz transmission spectroscopy and infrared reflection spectroscopy. The terahertz conductivity spectrum shows that the transition is not a simple cross-over between two states. As the charges become delocalized during the insulator to metal transition, a broad resonant mode corresponding to the eigenfrequency of the binding potential appears in the terahertz conductivity spectra in the ceramics, and it further softens as the metallic state prevails. This is a consequence of the complexity of charge motion in a temperature-dependent energy landscape, changing from the tightly bound charges on atomic distance in the insulating phase to almost free charges in the metallic phase. The insulator to metal transition is also accompanied by a weak softening of infrared-active phonon modes, which is related to the expansion of lattice parameters upon phase transition.n
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10402 - Inorganic and nuclear chemistry
Result continuities
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
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review B
ISSN
2469-9950
e-ISSN
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Volume of the periodical
102
Issue of the periodical within the volume
19
Country of publishing house
US - UNITED STATES
Number of pages
13
Pages from-to
1-13
UT code for WoS article
000584336200002
EID of the result in the Scopus database
2-s2.0-85096312598