Structural and electronic response of overexpanded superconducting fullerides close to the Mott insulator boundary

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dc.authorid0000-0003-3439-0716en_US
dc.contributor.authorMenelaou, M.
dc.contributor.authorTakabayashi, Y.
dc.contributor.authorOkur Kutay, Havva Esma
dc.contributor.authorZadik, R. H.
dc.contributor.authorPrassides, K.
dc.date.accessioned2021-03-20T20:13:07Z
dc.date.available2021-03-20T20:13:07Z
dc.date.issued2018
dc.departmentBTÜ, Mühendislik ve Doğa Bilimleri Fakültesi, Kimya Mühendisliği Bölümüen_US
dc.descriptionInternational Conference on Electron Correlation in Superconductors in Nanostructures (ECSN) -- AUG 17-20, 2017 -- Odessa, UKRAINEen_US
dc.description.abstractThe ternary fulleride, Rb0.25Cs2.75C60, is the most expanded member of the family of face-centered cubic (fcc) structured superconducting fullerides ever accessed with superconductivity surviving at ambient pressure closest to the Mott insulator boundary. Here, we study the evolution of its structural and electronic properties with temperature. At ambient temperature, Rb0.25Cs2.75C60 lies in the Mott-Jahn-Teller (MJT) insulating part of the phase diagram. High-resolution synchrotron X-ray diffraction shows that its structure remains strictly cubic at all temperatures, but the transition to the metallic state at similar to 50 K - evident in the evolution of the magnetic susceptibility with temperature - is accompanied by a lattice collapse, Delta V/V-0 of 0 : 5%. Bulk superconductivity then emerges on further cooling with a T-c of 25.9 K. The results permit the extension of the electronic phase diagram of A(3)C(60) fullerides as close as possible to the metal-insulator (M-I) crossover.en_US
dc.description.sponsorshipWorld Premier International (WPI) Research Center Initiative for Atoms, Molecules and Materials, Ministry of Education, Culture, Sports, Science and Technology of Japan; Mitsubishi Foundation; Japan Society for the Promotion of Science (JSPS)Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT)Japan Society for the Promotion of Science [JP15H05882, JP17H05139]; Grants-in-Aid for Scientific ResearchMinistry of Education, Culture, Sports, Science and Technology, Japan (MEXT)Japan Society for the Promotion of ScienceGrants-in-Aid for Scientific Research (KAKENHI) [16H01063] Funding Source: KAKENen_US
dc.description.sponsorshipThis work was sponsored by the World Premier International (WPI) Research Center Initiative for Atoms, Molecules and Materials, Ministry of Education, Culture, Sports, Science and Technology of Japan. We acknowledge the financial support from the Mitsubishi Foundation and the Japan Society for the Promotion of Science (JSPS) under the Scientific Research on Innovative Areas 'J-Physics' (No. JP15H05882) and 'pi-System Figuration' (JP17H05139) Projects. We thank the ESRF for the access to synchrotron X-ray facilities and Prof. A.N. Fitch for the help with the synchrotron XRD experiments.en_US
dc.identifier.doi10.1142/S0217979218400209en_US
dc.identifier.issn0217-9792
dc.identifier.issn1793-6578
dc.identifier.issue17en_US
dc.identifier.scopusqualityQ3en_US
dc.identifier.urihttp://doi.org/10.1142/S0217979218400209
dc.identifier.urihttps://hdl.handle.net/20.500.12885/796
dc.identifier.volume32en_US
dc.identifier.wosWOS:000438217300005en_US
dc.identifier.wosqualityQ4en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorOkur Kutay, Havva Esma
dc.language.isoenen_US
dc.publisherWorld Scientific Publ Co Pte Ltden_US
dc.relation.ispartofInternational Journal Of Modern Physics Ben_US
dc.relation.publicationcategoryKonferans Öğesi - Uluslararası - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectSuperconductivityen_US
dc.subjectstrong correlationsen_US
dc.subjectMott insulatoren_US
dc.subjectinsulator-metal transitionen_US
dc.subjectelectronic phase diagramen_US
dc.titleStructural and electronic response of overexpanded superconducting fullerides close to the Mott insulator boundaryen_US
dc.typeConference Objecten_US

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