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Polarization-dependent resonant inelastic X-ray scattering study atthe Cu L and O K-edges of YBa2Cu3O7-x
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering. (Thin Film Physics, IFM)ORCID iD: 0000-0002-0317-0190
Research Department Synchrotron Radiation and Nanotechnology, Paul Scherrer Institut, Swiss Light Source (SLS), Switzerland.
Department of Physics and Astronomy, Division of Molecular and Condensed Matter Physics, Uppsala University, Uppsala, Sweden.
2018 (English)In: Journal of Electron Spectroscopy and Related Phenomena, ISSN 0368-2048, E-ISSN 1873-2526, Vol. 224, p. 38-44Article in journal (Refereed) Published
Abstract [en]

We present a study on the high-Tc superconductor (HTSC) YBa2Cu3O7-x(YBCO) using polarization-dependent X-ray absorption and resonant inelastic X-ray scattering. High-resolution measurementsusing synchrotron-radiation are compared with calculations using a quasi-atomic multiplet approachperformed at the Cu 2p3/2-edge of YBCO. We use a multiplet approach within the single impurity Ander-son model to reproduce and understand the character of the localized low-energy excitations in YBCO.We observe a distinct peak at about 0.5 eV in O K RIXS. This peak shows dependence on doping, incidentenergy, and momentum transfer that suggests that it has a different origin than the previously discussedcuprate bimagnons. Therefore, we assign it to bimagnon excitations within the Zhang Rice bands and/orthe Upper Hubbard bands, respectively.

Place, publisher, year, edition, pages
Elsevier, 2018. Vol. 224, p. 38-44
Keywords [en]
H-Tc superconductors, YBCO, cuprates, RIXS
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-145691DOI: 10.1016/j.elspec.2017.07.005ISI: 000428825400008Scopus ID: 2-s2.0-85029521510OAI: oai:DiVA.org:liu-145691DiVA, id: diva2:1190926
Available from: 2018-03-16 Created: 2018-03-16 Last updated: 2018-11-29Bibliographically approved

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Magnuson, Martin

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