Origin of strong correlations and superconductivity in NaxCoO2
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F08%3A00050957" target="_blank" >RIV/00216224:14310/08:00050957 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1103/PhysRevB.77.104532" target="_blank" >http://dx.doi.org/10.1103/PhysRevB.77.104532</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevB.77.104532" target="_blank" >10.1103/PhysRevB.77.104532</a>
Alternative languages
Result language
angličtina
Original language name
Origin of strong correlations and superconductivity in NaxCoO2
Original language description
We propose a minimal model resolving a puzzle of enigmatic correlations observed in sodium-rich NaxCoO2 where one expects a simple, free motion of the dilute S = 1 / 2 holes doped into a band insulator NaCoO2. The model also predicts singlet superconductivity at experimentally observed compositions. The model is based on a key property of cobalt oxides - the spin-state quasidegeneracy of CoO6 octahedral complex -leading to an unusual physics of, e.g., LaCoO3. We show that correlated hopping between t2gand eg states leads to the spin-polaron physics at x~1, and to an extended s-wave pairing at larger doping when coherent fermionic bands are formed.
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
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Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2008
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
77
Issue of the periodical within the volume
10
Country of publishing house
US - UNITED STATES
Number of pages
6
Pages from-to
104532-104537
UT code for WoS article
000254542700128
EID of the result in the Scopus database
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