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On the presence of Cu1+ in the superconducting (Hg,M)Sr2CuO4+delta; M = Cr, Mo, or Re

DSpace at IIT Bombay

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Title On the presence of Cu1+ in the superconducting (Hg,M)Sr2CuO4+delta; M = Cr, Mo, or Re
 
Creator BALAMURUGAN, S
PRAKASH, O
PADALIA, BD
GOPALAKRISHNAN, IK
YAKHMI, JV
SELVAM, P
 
Subject x-ray-absorption
neutron powder diffraction
t-c
crystal-structure
k superconductor
high-pressure
cuk-xanes
hgba2cuo4+delta
mercury
hgba2ca2cu3o8+delta
superconductivity
hg-cuprate
hg/sr-1201
xanes
 
Description The Cu K-edge measurements on the optimum T-c 1201 compounds (Hg1-xMx)Sr2CuO4+delta (M = Cr, Mo, or Re; 0.10 less than or equal to x less than or equal to 0.30) show besides Cu2+ (predominant) a very weak but distinct signature of Cu1+, only in the superconducting (SC) samples. The Cu1+ feature is conspicuously absent when these compositions are non-superconducting because of different processing conditions. Our finding of monovalent Cu in SC(Hg,M)/Sr-1201 favors the presence of Cu at the Hg-site and this seems to facilitate superconductivity in these cuprates.
 
Publisher KLUWER ACADEMIC/PLENUM PUBL
 
Date 2011-08-17T10:02:54Z
2011-12-26T12:55:29Z
2011-12-27T05:40:44Z
2011-08-17T10:02:54Z
2011-12-26T12:55:29Z
2011-12-27T05:40:44Z
2003
 
Type Article
 
Identifier JOURNAL OF SUPERCONDUCTIVITY, 16(3), 581-584
0896-1107
http://dx.doi.org/10.1023/A:1023889525034
http://dspace.library.iitb.ac.in/xmlui/handle/10054/9832
http://hdl.handle.net/10054/9832
 
Language en