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|Title:||Low concentration dopant disorder modified carrier scattering and related correlations in YBCO|
|Authors:||Upreti, U C|
Narlikar, A V
|Abstract:||The possible carrier scattering modifications and the related correlations due to low concentration planar and chain site. Zn and Fe, dopings in YBCO thin films have been explored. Zn seems to lower Tc as well as resistivity up to about 300K whereas Fe raises the mean field Tc slightly but enhances the resistivity remarkably. The resistivity behaviour site selectivity effect on resistivity and coherence length, and the interaction effects in resistivity and coherence data have been presented. The study indicates strong interplay between impurity effects and carrier-carrier scattering. The inverse variation or Tc with coherence length ξ,and the Tc degradation and ξenhancement seem to be due to change or the carrier-carrier scattering by impurity not by the direct carrier-impurity scattering.|
|ISSN:||0975-1041 (Online); 0019-5596 (Print)|
|Appears in Collections:||IJPAP Vol.40(09) [September 2002]|
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