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Effect of Hydrostatic Pressure on the Superconductivity in NaxCoO2.yH2O | | B. Lorenz
; J. Cmaidalka
; R. L. Meng
; C. W. Chu
; | | Date: |
24 Apr 2003 | | Journal: | Phys. Rev. B 68, 132504 (2003) | | Subject: | Superconductivity; Strongly Correlated Electrons | cond-mat.supr-con cond-mat.str-el | | Abstract: | The effect of hydrostatic pressure on the superconducting transition temperature of Na{0.35}CoO{2}.yH{2}O was investigated by ac susceptibility measurements up to 1.6 GPa. The pressure coefficient of T{c} is negative and the dependence T{c}(p) is nonlinear over the pressure range investigated. The magnitude of the average dlnT{c}/dp=-0.07 GPa^{-1} is comparable to the pressure coefficient of electron-doped high-T{c} copper oxide superconductors with a similar value of T{c}. Our results provide support to the assumption of two-dimensional superconductivity in Na{0.35}CoO{2}.yH{2}O, which is similar to the cuprate systems, and suggest that intercalation of larger molecules may lead to an enhancement of T{c}. | | Source: | arXiv, cond-mat/0304537 | | Services: | Forum | Review | PDF | Favorites | |
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