Excitonic condensation of strongly correlated electrons: the case of Pr0.5 Ca0.5 CoO3.
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F14%3A00439025" target="_blank" >RIV/68378271:_____/14:00439025 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1103/PhysRevB.90.235112" target="_blank" >http://dx.doi.org/10.1103/PhysRevB.90.235112</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevB.90.235112" target="_blank" >10.1103/PhysRevB.90.235112</a>
Alternative languages
Result language
angličtina
Original language name
Excitonic condensation of strongly correlated electrons: the case of Pr0.5 Ca0.5 CoO3.
Original language description
We use a combination of dynamical mean-field model calculations and LDA?+?U material specific calculations to investigate the low temperature phase transition in the compounds from the (Pr1yRy)xCa1xCoO3 (R=Nd,Sm,Eu,Gd,Tb,Y) family (PCCO). The transition,marked by a sharp peak in the specific heat, leads to an exponential increase of dc resistivity and a drop of the magnetic susceptibility, but no order parameter has been identified yet. We show that condensation of spin-triplet, atomic-size excitons provides a consistent explanation of the observed physics. In particular, it explains the exchange splitting on the Pr sites and the simultaneous Pr valence transition. The excitonic condensation in PCCO is an example of a general behavior expected in certain systems in the proximity of a spin-state transition.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BM - Solid-state physics and magnetism
OECD FORD branch
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Result continuities
Project
<a href="/en/project/GA13-25251S" target="_blank" >GA13-25251S: Strong electron correlations in systems with spin-orbit coupling</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2014
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
1098-0121
e-ISSN
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Volume of the periodical
90
Issue of the periodical within the volume
23
Country of publishing house
US - UNITED STATES
Number of pages
5
Pages from-to
"235112-1"-"235112-5"
UT code for WoS article
000346370500003
EID of the result in the Scopus database
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