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O K -edge and CuL23-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, M.
dc.contributor.author Kotiranta, Maarit
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 2015-10-06T09:02:36Z
dc.date.available 2015-10-06T09:02:36Z
dc.date.issued 2001
dc.identifier.citation Karppinen, M. & Kotiranta, Maarit & Yamauchi, H. & Nachimuthu, P. & Liu, R. S. & Chen, J. M. 2001. O K -edge and CuL23-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. Volume 63, Issue 18. 184507/1-6. ISSN 1550-235X (electronic). DOI: 10.1103/physrevb.63.184507. en
dc.identifier.issn 1550-235X (electronic)
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/17955
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 Ca-substitution 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 184507/1-6
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher American Physical Society (APS) en
dc.relation.ispartofseries Physical Review B en
dc.relation.ispartofseries Volume 63, Issue 18
dc.rights © 2001 American Physical Society (APS). This is the accepted version of the following article: Karppinen, M. & Kotiranta, Maarit & Yamauchi, H. & Nachimuthu, P. & Liu, R. S. & Chen, J. M. 2001. O K -edge and CuL23-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. Volume 63, Issue 18. 184507/1-6. ISSN 1550-235X (electronic). DOI: 10.1103/physrevb.63.184507, which has been published in final form at http://journals.aps.org/prb/abstract/10.1103/PhysRevB.63.184507. en
dc.subject.other Chemistry en
dc.subject.other Physics en
dc.title O K -edge and CuL23-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.rights.holder American Physical Society (APS)
dc.contributor.school Kemian tekniikan korkeakoulu fi
dc.contributor.school School of Chemical Technology en
dc.contributor.department Kemian laitos fi
dc.contributor.department Department of Chemistry en
dc.subject.keyword x-ray absorption en
dc.subject.keyword superconductivity en
dc.identifier.urn URN:NBN:fi:aalto-201510064540
dc.type.dcmitype text en
dc.identifier.doi 10.1103/physrevb.63.184507
dc.type.version Final published version en


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