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- W1489628563 startingPage "14631" @default.
- W1489628563 abstract "We have measured the pressure dependence of the superconducting transition temperature ${T}_{c}$ within a large range of doping in $({mathrm{Ca}}_{x}{mathrm{La}}_{1ensuremath{-}x})({mathrm{Ba}}_{1.75ensuremath{-}x}{mathrm{La}}_{0.25+x}){mathrm{Cu}}_{3}{mathrm{O}}_{y}$. This charge-compensated 1:2:3 family is tetragonal, and free of the plateau structure and of structural phase transitions. The pressure ($P$) dependence of ${T}_{c}$ is analyzed in terms of two easily determined variables, ${T}_{c}^{max}$ (maximal attainable ${T}_{c}$) and the relative chemical charge $ensuremath{Delta}q=yensuremath{-}{y}_{mathrm{M}ensuremath{-}mathrm{I}}(x)$ (the oxygen content $y$ measured with respect to its value at the metal-insulator transition), used to describe the dependence of ${T}_{c}$ on doping for all values of $x$ and $y$. Assuming a simple parabolic relationship between ${T}_{c}$ and $ensuremath{Delta}q$ that does not broaden with $P$, we derive an expression for $frac{d{T}_{c}}{mathrm{dP}}$ containing contributions from both $frac{densuremath{Delta}q}{mathrm{dP}}$ and $frac{d{T}_{c}^{max}}{mathrm{dP}}$ which are dominant far away from and in the vicinity of optimal doping, respectively. We obtain in this family reliable values of the derivatives, $frac{d{T}_{c}^{max}}{mathrm{dP}}=+1.7$ K/GPa and $frac{densuremath{Delta}q}{mathrm{dP}}=+frac{0.011|e|}{mathrm{GPa}}$ which are constant, independent of the doping level, as anticipated by our simple analysis." @default.
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- W1489628563 date "1996-06-01" @default.
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- W1489628563 title "Pressure dependence ofTcin cuprate superconductors: Application to(CaxLa1−x)(Ba1.75−xLa0.25+x)Cu3Oy" @default.
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- W1489628563 doi "https://doi.org/10.1103/physrevb.53.14631" @default.
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