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Layer-specific hole concentrations in Bi2Sr2(Y1-xCax) Cu2O8+δ as probed by XANES spectroscopy and coulometric redox analysis

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Karppinen, M.
dc.contributor.author Kotiranta, Miia
dc.contributor.author Nakane, T.
dc.contributor.author Yamauchi, H.
dc.contributor.author Chang, Sungchun
dc.contributor.author Liu, R.-S.
dc.contributor.author Chen, J. M.
dc.date.accessioned 2018-05-22T14:50:41Z
dc.date.available 2018-05-22T14:50:41Z
dc.date.issued 2003-04
dc.identifier.citation Karppinen , M , Kotiranta , M , Nakane , T , Yamauchi , H , Chang , S , Liu , R-S & Chen , J M 2003 , ' Layer-specific hole concentrations in Bi 2 Sr 2 (Y 1-x Ca x ) Cu 2 O 8+δ as probed by XANES spectroscopy and coulometric redox analysis ' , Physical Review B , vol. 67 , no. 13 , 134522 , pp. 1-6 . https://doi.org/10.1103/PhysRevB.67.134522 en
dc.identifier.issn 0163-1829
dc.identifier.issn 1550-235X
dc.identifier.other PURE UUID: e28e6289-51c2-4c14-9724-775b3f1f4200
dc.identifier.other PURE ITEMURL: https://research.aalto.fi/en/publications/e28e6289-51c2-4c14-9724-775b3f1f4200
dc.identifier.other PURE LINK: http://www.scopus.com/inward/record.url?scp=0038147096&partnerID=8YFLogxK
dc.identifier.other PURE FILEURL: https://research.aalto.fi/files/14768815/PhysRevB.67.134522.pdf
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/31218
dc.description.abstract Induction of holes not only in the superconductive CuO2 plane but also in the Bi2O2-δ charge reservoir of the Bi2Sr2(Y1-xCax) Cu2O8+δ superconductor upon CaII-for-YIII substitution is evidenced by means of two independent techniques, i.e., high-resolution x-ray-absorption near-edge structure (XANES) spectroscopy measurements and coulometric redox titrations. The absolute values derived for the CuO2-plane hole concentration from the Cu L2,3-edge XANES spectra are in good agreement with those obtained from the coulometric redox analysis. The CuO2-plane hole concentration is found to increase from 0.03 to 0.14 concomitantly with the increase in the BiO1+δ/2-layer hole concentration from 0.00 to 0.13 as the Ca-substitution level, x, increases from 0 to 1. The threshold CuO2-plane hole concentration for the appearance of superconductivity is determined at 0.06, while the highest Tc is obtained at the hole concentration of 0.12. In the O K-edge XANES spectrum, the increases in the CuO2-plane and BiO1+δ/2-layer holeconcentrations with increasing x are seen as enhancement in the relative intensities of the pre-edge peaks at ∼528.3 and ∼530.5 eV, respectively. en
dc.format.extent 6
dc.format.extent 1-6
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries PHYSICAL REVIEW B en
dc.relation.ispartofseries Volume 67, issue 13 en
dc.rights openAccess en
dc.title Layer-specific hole concentrations in Bi2Sr2(Y1-xCax) Cu2O8+δ as probed by XANES spectroscopy and coulometric redox analysis en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Department of Chemistry
dc.contributor.department Tokyo Institute of Technology
dc.contributor.department National Taiwan University
dc.contributor.department National Synchrotron Radiation Research Center Taiwan
dc.identifier.urn URN:NBN:fi:aalto-201805222658
dc.identifier.doi 10.1103/PhysRevB.67.134522
dc.type.version publishedVersion

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