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Low energy electronic spectroscopy of an infinite-layer cuprate: A resonant inelastic X-ray scattering study of CaCuO2
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2010 (Engelska)Ingår i: Physica. C, Superconductivity, ISSN 0921-4534, E-ISSN 1873-2143, Vol. 470, nr 3, s. 187-192Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

We report the results of Oxygen K-edge soft X-ray absorption and emission spectroscopy that was performed on an infinite-layer insulating cuprate thin film CaCuO2 Experimentally obtained spectra arc consistent with local density approximation calculations X-ray absorption spectra show a close resemblance to spectra obtained from homologous single crystal cuprates In addition to d-d excitations. X-ray emission spectra reveal the presence of Zhang-Rice singlet states in the infinite-layer CuO2 planes The question of whether the Zhang-Rice singlet features are masked by the O 2p main-band is addressed. it is possible to quantify the position of the Zhang-Rice singlet using emission intensity profiles X-ray emission is demonstrated as a tool for understanding CuO2 planar electronic correlation in the prototypical infinite-layer The energy difference, 2 0 eV, between the oxygen main-band and the Zhang-Rice singlet band is found to match values obtained theoretically using established planar electronic correlation parameters.

Ort, förlag, år, upplaga, sidor
2010. Vol. 470, nr 3, s. 187-192
Nyckelord [en]
Electronic structure, X-ray absorption spectra, X-ray emission spectra, Electronic density of states, High-temperature superconductors, Calcium compounds, Infinite-layer cuprates
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URN: urn:nbn:se:uu:diva-136789DOI: 10.1016/j.physc.2009.12.028ISI: 000275613600001OAI: oai:DiVA.org:uu-136789DiVA, id: diva2:377486
Tillgänglig från: 2010-12-14 Skapad: 2010-12-14 Senast uppdaterad: 2017-12-11Bibliografiskt granskad

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