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Polarization-dependent resonant inelastic X-ray scattering study atthe Cu L and O K-edges of YBa2Cu3O7-x
Linköpings universitet, Institutionen för fysik, kemi och biologi, Tunnfilmsfysik. Linköpings universitet, Tekniska fakulteten. (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 (engelsk)Inngår i: Journal of Electron Spectroscopy and Related Phenomena, ISSN 0368-2048, E-ISSN 1873-2526, Vol. 224, s. 38-44Artikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
Elsevier, 2018. Vol. 224, s. 38-44
Emneord [en]
H-Tc superconductors, YBCO, cuprates, RIXS
HSV kategori
Identifikatorer
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
Tilgjengelig fra: 2018-03-16 Laget: 2018-03-16 Sist oppdatert: 2018-06-04bibliografisk kontrollert

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