Competitive coexistence of superconductivity with antiferromagnetism in CeRhIn5.
Competitive coexistence of superconductivity with antiferromagnetism in CeRhIn5.
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DOI：
10.1103/physrevlett.97.017005
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发表时间：
2006-07
影响因子：
8.6
通讯作者：
Genfu Chen;K. Matsubayashi;S. Ban;K. Deguchi;N. Sato
中科院分区：
文献类型：
--
作者：
Genfu Chen;K. Matsubayashi;S. Ban;K. Deguchi;N. Sato
我们进行了交流磁化率测量压力P下的重费米子反铁磁体CeRhIn 5。我们报告体超导（SC）在环境压力下的转变温度Tc约等于90 mK。粉末或抛光样品中的降解SC通过退火恢复，表明SC状态对不均匀性敏感。在SC与反铁磁性（AF）共存区，我们发现Tc（P）（n）TN（P）（1-n）= const其中TN表示Néel温度，n表示TN以下和TN以上的电子比热系数之比，表明SC和AF对费米面态的竞争.
We carried out ac magnetic susceptibility measurements under pressures P on the heavy fermion antiferromagnet CeRhIn5. We report bulk superconductivity (SC) at ambient pressure with a transition temperature Tc approximately or equal to 90 mK. The degraded SC in a powdered or polished sample was restored by annealing, showing that the SC state is sensitive to inhomogeneity. In a coexistence region of the SC with antiferromagnetism (AF), we find that Tc(P)(n)TN(P)(1-n) = const where TN indicates a Néel temperature and n denotes a ratio of electronic specific heat coefficients below and above TN, indicating the competition of the SC and the AF for states at the Fermi surface.