Anjli Chhikara et al 1999 J. Phys.: Condens. Matter 11 L229 doi:10.1088/0953-8984/11/22/101
Superconductivity suppression in (Er1-xPrx)Ba2Cu4O8: an x-ray absorption spectroscopic study
Anjli Chhikara
, K R Priolkar, P R Sarode, R B Prabhu and A V Narlikar
LETTER TO THE EDITOR
In this letter we report our measurements of Er and Pr L3 edges in Er1-xPrxBa2Cu4O8, 0
x0.6. The normalized L3-edge intensity is seen to closely follow the behaviour of Tc with the Pr concentration in these compounds. This can be related to the fact that there is a reduction in the number of mobile carriers with increasing Pr-doping level. This picture lends support to a recent model proposed by Liechtenstein and Mazin (Liechtenstein A I and Mazin I I 1995 Phys. Rev. Lett. 70 1000) according to which the holes are localized in a band which crosses the Fermi level along with a hybridized state of 4f2L and 4f1 at the Pr site, where L is a ligand hole.
- PACS
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74.62.Dh Effects of crystal defects, doping and substitution
74.72.Jt Other cuprates, including Tl and Hg-based cuprates
- Subjects
- Dates
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Issue 22 (7 June 1999)
Received 10 March 1999, in final form 29 April 1999
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Superconductivity suppression in (Er1-xPrx)Ba2Cu4O8: an x-ray absorption spectroscopic study
Anjli Chhikara et al 1999 J. Phys.: Condens. Matter 11 L229
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