Superconductivity in the spin-state crossover materials: Nickelates with planar-coordinated low-spin Ni2+ ions
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F25%3A00142182" target="_blank" >RIV/00216224:14310/25:00142182 - isvavai.cz</a>
Result on the web
<a href="https://journals.aps.org/prb/abstract/10.1103/s5b6-crzc" target="_blank" >https://journals.aps.org/prb/abstract/10.1103/s5b6-crzc</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/s5b6-crzc" target="_blank" >10.1103/s5b6-crzc</a>
Alternative languages
Result language
angličtina
Original language name
Superconductivity in the spin-state crossover materials: Nickelates with planar-coordinated low-spin Ni2+ ions
Original language description
We theoretically study quasi-two-dimensional nickel compounds, where the nickel ions assume Ni2+d8 valence state and feature a low-spin S=0 ground state quasidegenerate with S=1 ionic excitations. Such a level structure is supported by square-planar coordination of nickel ions or a suitable substitution of apical oxygens. We construct the corresponding singlet-triplet exchange model and explore its phase diagram and excitation spectrum. By hole doping, we further introduce mobile Ni3+d7 ionic configurations with effective spins S=1/2, and analyze their interactions with the d8 singlet-triplet background. The interplay with the triplet excitations in the d8 sector is found to have a deep impact on the propagation of the doped holelike charge carriers and is identified as a powerful source of Cooper pairing among them.
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
—
OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2025
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
2469-9969
Volume of the periodical
112
Issue of the periodical within the volume
7
Country of publishing house
US - UNITED STATES
Number of pages
12
Pages from-to
„075157-1“-„075157-12“
UT code for WoS article
001562794300004
EID of the result in the Scopus database
2-s2.0-105021056575