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- W2043634065 abstract "Abstract For Y 1 Ba 2 Cu 3 O 7 , we estimated the critical-temperature pressure derivative d T c /d P and the three principal uniaxial compressive-stress derivatives d T c /dσ a , d T c /dσ b , d T c /dσ c . These estimates are useful because the measured values, especially d T c /dσ ij , show such strong disagreement. To estimate these thermodynamic quantities, we extended a model of Ohta and coworkers that relates T c to Δ V A , the difference in Madelung energy at the two oxygen sites, apical and planar. We found that d T c /d P is positive, but small: 0.09 K/GPa. For uniaxial-stress, we found that d T c /dσ c : 0.09 K/GPa. Thus, uniaxial compression along the c -axis (bringing together the CuO 2 planes) produces no remarkable change in T c . We found a negative d T c /dσ b : -0.06 K/GPa. This negative value agrees with results derived by Millis and Rabe, and it agrees with T c increasing with an increasing b unit-cell dimension. Plane compressive stress in the a – c plane produces the largest effect: 0.17 K/GPa, twice that for hydrostatic compression." @default.
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- W2043634065 date "1991-06-01" @default.
- W2043634065 modified "2023-10-01" @default.
- W2043634065 title "Estimated dTc⧸dP and dTc⧸dσij for the Y1Ba2Cu3O7 superconductor" @default.
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- W2043634065 doi "https://doi.org/10.1016/0921-4534(91)90301-e" @default.
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