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Cluster Model Description of Polarized Cu K-Edge Spectra of Nd_(2-x)Ce_xCuO_(4-δ)

Liang, G. and Li, M. and Markert, J. T. and Wang, L. V. (1998) Cluster Model Description of Polarized Cu K-Edge Spectra of Nd_(2-x)Ce_xCuO_(4-δ). International Journal of Modern Physics B, 12 (29). pp. 3299-3305. ISSN 0217-9792. https://resolver.caltech.edu/CaltechAUTHORS:20170314-110617536

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Abstract

Single crystals Nd_(2-x)Ce_xCuO_(4-δ) with x=0.0 and 0.2 are studied by polarized X-ray absorption measurements at Cu K-edge. The positions and intensities of the 1s→ 4pσ transition features in the K-edge spectra are analyzed with a modified cluster model and functional curve fitting procedure. All of the experimental results including the energies of the spectral features, the energy separations between features and the variation of feature intensities, can be well explained by the cluster model parameters obtained from the curve fitting. Particularly, it is found that the charge transfer energy gap Δ in the Nd_(2-x)Ce_xCuO_(4-δ) system decreases from about 1.4 eV at x=0 to 0.5 eV at x = 0.2. Our analysis in this paper provides a method for quantitative X-ray absorption spectroscopy (XAS) study of the charge transfer gap for electron-doped cuprate superconductors and related materials.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1142/S0217979298002519DOIArticle
http://www.worldscientific.com/doi/abs/10.1142/S0217979298002519PublisherArticle
ORCID:
AuthorORCID
Wang, L. V.0000-0001-9783-4383
Alternate Title:Cluster Model Description of Polarized Cu K-Edge Spectra of Nd2-xCexCuO4-δ
Additional Information:© 1998 World Scientific Publishing Co. Received: 23 February 1998; Revised: 23 April 1998.
Issue or Number:29
Record Number:CaltechAUTHORS:20170314-110617536
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20170314-110617536
Official Citation:Cluster Model Description of Polarized Cu K-Edge Spectra of Nd2-xCexCuO4-δ G. Liang, M. Li, J. T. Markert, and L. V. Wang International Journal of Modern Physics B 1998 12:29n31, 3299-3305
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:75095
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:16 Mar 2017 18:40
Last Modified:03 Oct 2019 16:46

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