NDLI: Enhanced Superconductivity in (Cu$_{0.5}$Tl$_{0.25}$Cs$_{0.25}$)Ba$_{2}$Ca$_{2}$Cu$_{3}$O$

Content Provider	Springer Nature Link
Author	Khan, Nawazish A. Hussain, Safeer
Copyright Year	2008
Abstract	The self doping of carriers in CuO$_{2}$ planes (accomplished through post annealing in air, N$_{2}$ and O$_{2}$ atmospheres in previous studies) is replaced by a more efficient alkali metal dopant such as Cs. The doping of Cs in the Cu$_{0.5}$Tl$_{0.5}$Ba$_{2}$O$_{4−δ }$ charge reservoir of Cu$_{0.5}$Tl$_{0.5}$Ba$_{2}$Ca$_{2}$Cu$_{3}$O$_{10−δ }$ superconductors has been found to enhance its superconducting properties. Enhanced superconductivity parameters, such as T $_{c}$, H $_{c}$ and J $_{c}$, most likely arise from the enhanced doping efficiency of Cu$_{0.5}$Tl$_{0.25}$Cs$_{0.25}$Ba$_{2}$O$_{4−δ }$ charge reservoir layer; since the alkali metals are known to lose their outermost “s-orbital” electron, which could be supplied to conducting CuO$_{2}$ planes. The distance between efficiently doped CuO$_{2}$ planes is reduced by Be and Mg doping at the Ca Sites. The quantity of diamagnetism and zero resistivity critical temperature [T $_{c}$(R=0)] are suppressed by these substitutions. The post-annealing of the Cs doped samples further enhances their superconducting properties; oxygen doping most likely promotes the optimum holes concentration in the superconducting state in the Cs doped samples. These observations have also shown that the free carrier density plays a significant role in the mechanism of superconductivity which was accomplished by synthesizing (Cu$_{0.5}$Tl$_{0.25}$Cs$_{0.25}$)Ba$_{2}$Ca$_{2}$Cu$_{3}$O$_{10−δ }$ superconductors.
Starting Page	26
Ending Page	34
Page Count	9
File Format	PDF
ISSN	00222291
Journal	Journal of Low Temperature Physics
Volume Number	153
Issue Number	1-2
e-ISSN	15737357
Language	English
Publisher	Springer US
Publisher Date	2008-08-20
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	(Cu$_{0.5}$Tl$_{0.25}$Cs$_{0.25}$)Ba$_{2}$Ca$_{2}$Cu$_{3}$O$_{10−δ }$ superconductors Higher T $_{c}$(R=0) with Cs doping Enhanced diamagnetism Post-annealing Cuprate superconductors Magnetism, Magnetic Materials Characterization and Evaluation of Materials Condensed Matter
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Materials Science

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Self-doping Effects on the Superconducting Properties of Cu$_{0.5}$Tl$_{0.25}$M$_{0.25}$Ba$_{2}$Ca$_{2}$Cu$_{3}$O$_{10−δ }$ (M = Bi, Hg, Nb, Pd, Li, Na, K)

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Superconductivity and Fluctuation-Induced Conductivity (FIC) Analysis of (Cu$_{0.5}$Tl$_{0.5−x }$M$_{ x }$)Ba$_{2}$Ca$_{2}$Cu$_{3}$O$_{10−δ }$

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