Effect of Hydrostatic Pressure on the Superconductivity in NaxCoO2.yH2O
B. Lorenz, J. Cmaidalka, R. L. Meng, C. W. Chu
TL;DR
This study investigates how hydrostatic pressure affects the superconducting transition temperature of Na{0.35}CoO{2}.yH{2}O, revealing a nonlinear decrease in T{c} and supporting its two-dimensional superconductivity nature.
Contribution
It provides the first detailed measurement of pressure effects on T{c} in Na{0.35}CoO{2}.yH{2}O, highlighting the potential for T{c} enhancement through molecular intercalation.
Findings
Pressure decreases T{c} nonlinearly
Pressure coefficient similar to cuprates
Supports two-dimensional superconductivity model
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}.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.