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Modeling And Photoabsorption Study of YPd2-xRhxB2C Superconductors

Published online by Cambridge University Press:  01 February 2011

L.-S. Hsu ,
Y. K. Wang ,
G. Y. Guo ,
Y.-J. Huang  and
M.-D. Lan
L.-S. Hsu
Affiliation:
Department of Physics, National Chang-Hua University of Education, Chang-Hua 50058, Taiwan, ROC
Y. K. Wang
Affiliation:
Department of Physics, National Taiwan University, Taipei 106, Taiwan, ROC
G. Y. Guo
Affiliation:
Department of Physics, National Taiwan University, Taipei 106, Taiwan, ROC Synchrotron Radiation Research Center, Hsinchu 300, Taiwan, ROC
Y.-J. Huang
Affiliation:
Department of Physics, National Chung Hsing University, Taichung 402, Taiwan, ROC
M.-D. Lan
Affiliation:
Department of Physics, National Chung Hsing University, Taichung 402, Taiwan, ROC
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Abstract

The electronic structures of six polycrystalline borocarbide superconductors YPd5-xRhxB3C0.4 (x=0, 0.05, 0.1, 0.15, 0.2, and 0.25) were studied by photoemission and photoabsorption spectroscopies and theoretical calculations. The valence-band (VB) photoemission spectrum is compared with the theoretical total and partial density-of-states (DOS) curves. The Pd L3-edge x-ray absorption near edge spectra (XANES) are compared with the calculated XANES spectra for these intermetallic compounds. The decrease of the superconducting transition temperatures (Tc) with addition of Rh dopant in these compounds is due to a decrease of the total DOS at the Fermi level (EF).

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 731: Symposium W – Modeling and Numerical Simulation of Materials Behavior and Evolution , 2002 , W8.13
Copyright
Copyright © Materials Research Society 2002

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