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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

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Karppinen, Maarit
dc.contributor.author Kotiranta, Miia
dc.contributor.author Yamauchi, H.
dc.contributor.author Nachimuthu, P.
dc.contributor.author Liu, R.S.
dc.contributor.author Chen, J.M.
dc.date.accessioned 2018-05-22T14:34:51Z
dc.date.available 2018-05-22T14:34:51Z
dc.date.issued 2001
dc.identifier.citation Karppinen , 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.63.184507 en
dc.identifier.issn 1550-235X
dc.identifier.other PURE UUID: 45499560-d424-4c9c-933c-fec9eb575b3c
dc.identifier.other PURE ITEMURL: https://research.aalto.fi/en/publications/45499560-d424-4c9c-933c-fec9eb575b3c
dc.identifier.other PURE FILEURL: https://research.aalto.fi/files/14777209/PhysRevB.63.184507.pdf
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/30881
dc.description.abstract By 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.format.extent 1-6
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries Physical Review B Condensed Matter and Materials Physics en
dc.relation.ispartofseries Volume 63, issue 18 en
dc.rights openAccess en
dc.title 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 en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Department of Chemistry en
dc.subject.keyword K-edge
dc.subject.keyword XANES
dc.identifier.urn URN:NBN:fi:aalto-201805222321
dc.identifier.doi 10.1103/PhysRevB.63.184507
dc.type.version publishedVersion

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