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

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorKarppinen, M.
dc.contributor.authorKotiranta, Maarit
dc.contributor.authorYamauchi, H.
dc.contributor.authorNachimuthu, P.
dc.contributor.authorLiu, R. S.
dc.contributor.authorChen, J. M.
dc.contributor.departmentKemian laitosfi
dc.contributor.departmentDepartment of Chemistryen
dc.contributor.schoolKemian tekniikan korkeakoulufi
dc.contributor.schoolSchool of Chemical Technologyen
dc.date.accessioned2015-10-06T09:02:36Z
dc.date.available2015-10-06T09:02:36Z
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 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.description.versionPeer revieweden
dc.format.extent184507/1-6
dc.format.mimetypeapplication/pdfen
dc.identifier.citationKarppinen, 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.doi10.1103/physrevb.63.184507
dc.identifier.issn1550-235X (electronic)
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/17955
dc.identifier.urnURN:NBN:fi:aalto-201510064540
dc.language.isoenen
dc.publisherAmerican Physical Society (APS)en
dc.relation.ispartofseriesPhysical Review Ben
dc.relation.ispartofseriesVolume 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.rights.holderAmerican Physical Society (APS)
dc.subject.keywordx-ray absorptionen
dc.subject.keywordsuperconductivityen
dc.subject.otherChemistryen
dc.subject.otherPhysicsen
dc.titleO 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 phaseen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.dcmitypetexten
dc.type.versionFinal published versionen
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