Superconducting Transition in the $β$-Pyrochlore AOs$ 2$O$ 6$ A=Cs, Rb, K under Pressure - Condensed Matter > SuperconductivityReportar como inadecuado




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Abstract: Pressure dependence of superconducting transition temperature $T { m c}$ hasbeen determined through the DC magnetic measurements under pressure up to$P$=10 GPa for $\beta$-pyrochlore oxides AOs$ 2$O$ 6$ with A=Cs $T { mc}$=3.3 K, Rb 6.3 K and K 9.6 K. Both for A=Rb and Cs, $T { m c}$increases with increasing $P$ and shows a saturation at $T { m cm}$$\sim$8.8K, which is considered as the upper limit of $T { m c}$ inherent inAOs$ 2$O$ 6$. In contrast, the $T { m c}-P$ curve for KOs$ 2$O$ 6$ shows asharp maximum of $\sim$10 K at $P$$\sim$0.5 GPa, and $T { m c}$ is higher than$T { m cm}$ for 0$\leq$$P$$\leq$1.5GPa, suggesting the enhancedsuperconductivity due to the rattling of K ions.



Autor: K. Miyoshi, Y. Takaichi, Y. Takamatsu, M. Miura, J. Takeuchi

Fuente: https://arxiv.org/







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