Structural and electronic properties of the overexpanded quaternary superconducting fulleride K0.25Rb0.25CS2.5C60

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dc.authorid0000-0003-3439-0716en_US
dc.contributor.authorOkur Kutay, Havva Esma
dc.contributor.authorPrassides, Kosmas
dc.date.accessioned2021-03-20T20:12:33Z
dc.date.available2021-03-20T20:12:33Z
dc.date.issued2019
dc.departmentBTÜ, Mühendislik ve Doğa Bilimleri Fakültesi, Kimya Mühendisliği Bölümüen_US
dc.description.abstractThe structural and magnetic properties of the overexpanded quatemary K0.25Rb0.25Cs2.5C60 fulleride are investigated. Rietveld analysis of the high-resolution synchrotron X-ray powder diffraction data shows that K0.25Rb0.25Cs2.5C60 adopts a cubic structure with face-centered (fcc) symmetry. Magnetization measurements at ambient pressure reveal that the material is a superconductor with a transition temperature, T-c, of 29.4 K. Temperature dependence of the magnetic susceptibility does not show a simple temperature-independent Pauli susceptibility term instead, it shows a cusp at a certain temperature implying an insulator-to-metal crossover on cooling. Complementary high-pressure magnetization measurements to a pressure of 10.2 kbar show a non-monotonic response of TT with a dome-shaped scaling with pressure and a maximum value of 32.4 K at 3.9 kbar. The experimental results are consistent with quaternary K0.25Rb0.25Cs2.5C60 following the established unconventional behavior of overexpanded fullerides. However, our results also unveil well-defined detrimental cation specific effects on the electronic properties associated with the introduction of increased disorder in the tetrahedral interstices of the fcc fulleride structure.en_US
dc.description.sponsorshipMinistry of National Education of TurkeyMinistry of National Education - Turkey; JSPS by the Ministry of Education, Culture, Sports, Science and Technology, Japan [JP17H05139, JP18H04303, JP18K18724]en_US
dc.description.sponsorshipWe thank Y. Takabayashi, R. H. Colman, and R. H. Zadik for their assistance and discussion and the ESRF for access to synchrotron X-ray facilities. HEO acknowledges the Ministry of National Education of Turkey for financial support of her doctorate. This work was financially supported by Grants-in-Aid for Scientific Research (JSPS KAKENHI Grant Numbers JP17H05139, JP18H04303, and JP18K18724) by the Ministry of Education, Culture, Sports, Science and Technology, Japan.en_US
dc.identifier.doi10.1016/j.jpcs.2019.03.017en_US
dc.identifier.endpage49en_US
dc.identifier.issn0022-3697
dc.identifier.issn1879-2553
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage44en_US
dc.identifier.urihttp://doi.org/10.1016/j.jpcs.2019.03.017
dc.identifier.urihttps://hdl.handle.net/20.500.12885/611
dc.identifier.volume131en_US
dc.identifier.wosWOS:000468250500007en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorOkur Kutay, Havva Esma
dc.language.isoenen_US
dc.publisherPergamon-Elsevier Science Ltden_US
dc.relation.ispartofJournal Of Physics And Chemistry Of Solidsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectSuperconductivityen_US
dc.subjectInsulator-to-metal transitionen_US
dc.subjectStrongly correlated systemsen_US
dc.subjectDisorder effectsen_US
dc.titleStructural and electronic properties of the overexpanded quaternary superconducting fulleride K0.25Rb0.25CS2.5C60en_US
dc.typeArticleen_US

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