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- W2003117168 abstract "Pressure-induced superconductivity was studied for a spin-ladder cuprate ${text{Sr}}_{2}{text{Ca}}_{12}{text{Cu}}_{24}{text{O}}_{41}$ using nuclear magnetic resonance under pressures up to the optimal pressure 3.8 GPa. Pressure application leads to a transitional change from a spin-gapped state to a Fermi-liquid state at temperatures higher than ${T}_{c}$. The relaxation rate $1/{T}_{1}$ shows activated-type behavior at an onset pressure, whereas Korringa-like behavior becomes predominant at the optimal pressure, suggesting that an increase in the density of states at the Fermi energy leads to enhancement of ${T}_{c}$. Nuclear quadrupole resonance spectra suggest that pressure application causes transfer of holes from the chain to the ladder sites. The transfer of holes increases DOS below the optimal pressure. A dome-shaped ${T}_{c}$ versus pressure curve arises from naive balance between the transfer of holes and broadening of the band width." @default.
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- W2003117168 title "NMR and NQR study of pressure-induced superconductivity and the origin of critical-temperature enhancement in the spin-ladder cuprate<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mtext>Sr</mml:mtext></mml:mrow><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mrow><mml:mtext>Ca</mml:mtext></mml:mrow><mml:mrow><mml:mn>12</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mtext>Cu</mml:mtext></mml:mrow><mml:mrow><mml:mn>24</mml:mn></mml…" @default.
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- W2003117168 doi "https://doi.org/10.1103/physrevb.80.100503" @default.
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