O K-edge and Cu L23-edge XANES study on the concentration and distribution of holes in the (Pb2/3Cu1/3)3Sr2(Y,Ca) Cu2O8+z superconductive phase

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorKarppinen, Maarit
dc.contributor.authorKotiranta, Miia
dc.contributor.authorYamauchi, H.
dc.contributor.authorNachimuthu, P.
dc.contributor.authorLiu, R.S.
dc.contributor.authorChen, J.M.
dc.contributor.departmentDepartment of Chemistryen
dc.date.accessioned2018-05-22T14:34:51Z
dc.date.available2018-05-22T14:34:51Z
dc.date.issued2001
dc.description.abstractBy means of high-resolution O K-edge and Cu L23-edge x-ray absorption near-edge-structure spectroscopy continuous increase of the CuO2-plane hole concentration with increasing Casubstitution level has been established for the superconductive, oxygen-depleted (z≈0)(Pb2/3Cu1/3)3Sr2(Y1−xCax)Cu2O8+z[(Pb2/3Cu1/3)−3212] phase with a three-layer PbO-Cu-PbO charge-reservoir block. For the O K-edge absorption, a pre-edge peak at ∼528.3 eV is seen, originating from the excitation of the O 1s electron to the O 2p hole state located in the CuO2 plane. With increasing Ca-substitution level, the intensity of this peak continuously increases within the substitution range studied, i.e., 0<~x<~0.5. Consistently, with increasing x, the shoulder on the high-energy side of the main absorption peak at ∼932.0 eV in the Cu L23-edge spectra, i.e., a feature typically assigned to formally trivalent copper, enhances. From the Cu L23-edge spectra it was furthermore confirmed that the charge-reservoir copper remains in the monovalent state, indicating that the holes created through Ca substitution are directed solely into the superconductive CuO2 plane. In terms of increasing the CuO2-plane hole concentration, Ca substitution was found to work more efficiently in (Pb2/3Cu1/3)−3212 as compared to, e.g., the related Bi-2212 phase.en
dc.description.versionPeer revieweden
dc.format.extent1-6
dc.format.mimetypeapplication/pdf
dc.identifier.citationKarppinen , M , Kotiranta , M , Yamauchi , H , Nachimuthu , P , Liu , R S & Chen , J M 2001 , ' O K-edge and Cu L23-edge XANES study on the concentration and distribution of holes in the (Pb2/3Cu1/3)3Sr2(Y,Ca) Cu2O8+z superconductive phase ' , Physical Review B (Condensed Matter and Materials Physics) , vol. 63 , no. 18 , 184507 , pp. 1-6 . https://doi.org/10.1103/PhysRevB.63.184507en
dc.identifier.doi10.1103/PhysRevB.63.184507
dc.identifier.issn1550-235X
dc.identifier.otherPURE UUID: 45499560-d424-4c9c-933c-fec9eb575b3c
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/45499560-d424-4c9c-933c-fec9eb575b3c
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/14777209/PhysRevB.63.184507.pdf
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/30881
dc.identifier.urnURN:NBN:fi:aalto-201805222321
dc.language.isoenen
dc.relation.ispartofseriesPhysical Review B Condensed Matter and Materials Physicsen
dc.relation.ispartofseriesVolume 63, issue 18en
dc.rightsopenAccessen
dc.subject.keywordK-edge
dc.subject.keywordXANES
dc.titleO K-edge and Cu L23-edge XANES study on the concentration and distribution of holes in the (Pb2/3Cu1/3)3Sr2(Y,Ca) Cu2O8+z superconductive phaseen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionpublishedVersion
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