Two polarization dependent Auger decays observed by resonant photoelectron spectroscopy at the Cu2p-edge of superconducting BiSrCu-oxides

  • We report on a resonant photoemission (resPES) study of PbxBi2-xSr2-yLayCan-1CunO2n+4+d (BISCO) single crystals to unravel the resonant decay mechanisms at the Cu2p absorption edge. The resPES studies on superconducting BISCO are performed at Bessy U49/2. We investigated BISCO single crystals with different hole doping concentrations at temperatures between 300 K and 17 K. CuO films have been used as a reference. We focus on the resPES data recorded at the Cu2p absorption edge. We find a strong polarization dependence for in-plane and out-of-plane geometries (with respect to the Cu-O plane) in our data which are caused by two independent Auger processes. We also report on the influence of different doping concentrations. Our resPES data enable us to sort the individual resonant mechanisms at the Cu2p edge in more detail than recently anticipated (Brookes et al., 2015). We discuss our data in the context of the recent discussion about the applicability of the Zhang-Rice model (Chen et al., 2013).

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Metadaten
Author: Dieter SchmeißerORCiD, Christoph JanowitzORCiD
DOI:https://doi.org/10.1016/j.nimb.2017.01.084
ISSN:0168-583X
ISSN:1872-9584
Title of the source (English):Nuclear Instruments and Methods in Physics Research B
Document Type:Scientific journal article peer-reviewed
Language:English
Year of publication:2017
Tag:Cuprates; Resonant photoemission; Superconductor; Synchrotron radiation
Volume/Year:411
First Page:53
Last Page:56
Faculty/Chair:Fakultät 1 MINT - Mathematik, Informatik, Physik, Elektro- und Informationstechnik / FG Angewandte Physik und Halbleiterspektroskopie
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