SUBSTITUTIONAL EFFECT OF Zn AND Pr IN YBa2Cu3O7-delta

Naik, Miskil S and Prabhu, RB and Sarode, PR and Priolkar, KR and Vasanthacharya, NY (2009) SUBSTITUTIONAL EFFECT OF Zn AND Pr IN YBa2Cu3O7-delta. In: Modern Physics Letters B (MPLB) Condensed Matter Physics; Statistical Physics and Applied Physics, 23 (24). pp. 2915-2922.

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Abstract

The co-doping effect of Zn and Pr impurities in the compound of composition Y1-xPrxBa2[Cu1-yZny](3)O7-delta with x = 0.1, x = 0.2 and 0 <= y <= 0.1 has been investigated by analyzing the results of electrical resistivity measurements. It is found that for Pr substitution at x = 0.1, there is a minimal influence on in-plane processes, thereby slightly affecting T-c and residual resistivity rho(0), but with the resistivity slope d rho/dT becoming large for the range of y from 0.03 to 0.06, leading to a larger depinning effect. For x = 0.2 a drastic change is observed whereby rho(0) becomes abnormally large, and d rho/dT becomes negative, implying totally pinned charge stripes and no depinning. The second observation therefore suggests that Pr substitution converts the overdoped system to an optimally doped system, leading to the universal superconductor-insulator transition.

Item Type:	Journal Article
Publication:	Modern Physics Letters B (MPLB) Condensed Matter Physics; Statistical Physics and Applied Physics
Publisher:	World Scientific Publishing Co.
Additional Information:	Copyright of this article belongs to World Scientific Publishing, 2009.
Keywords:	High temperature superconductor; hole depletion; resistivity
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	17 Dec 2009 11:04
Last Modified:	19 Sep 2010 05:49
URI:	http://eprints.iisc.ac.in/id/eprint/24213

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