高压下CeFeAsO0.7F0.3中超导性与近藤效应竞争的证据
超导电性
2015-05-13 v5
摘要
通过高压电阻、同步辐射X射线衍射和金刚石对顶砧中的X射线吸收谱(XAS)测量，我们发现在CeFeAsO0.7F0.3中，存在一个压力诱导的量子相变，从超导态转变为与2%体积塌缩相关的非超导近藤屏蔽相。我们的CeFeAsO0.7F0.3中Ce-L3边的XAS数据清楚地显示，在相变后，谱权重从主峰转移到卫星峰，证明了在CeFeAsO1-xFx中压力下近藤单态的形成。我们的结果揭示了Ce-磷族超导体中压力诱导的近藤单态与BCS单态之间竞争的物理图像。
引用
@article{arxiv.0907.4212,
title = {Evidence for Competition between Superconductivity and Kondo Effect in CeFeAsO0.7F0.3 under High Pressure},
author = {Liling Sun and Xi Dai and Chao Zhang and Wei Yi and enfu Cheng and Nanlin Wang and Lirong Zheng and Zheng Jiang and Xiangjun Wei and Yuying Huang and Jie Yang and Zhian Ren and Wei Lu and Xiaoli Dong and Guangcan Che and Qi Wu and Hong Ding and Jing Liu and Tiandou Hu and Zhongxian Zhao},
journal= {arXiv preprint arXiv:0907.4212},
year = {2015}
}
备注
18 pages, 5 figures