利用空间分辨核磁共振研究重费米子与正常电子的界面
强关联电子
2016-02-16 v1
摘要
我们通过位点选择核磁共振（NMR）谱学研究了由重费米子超导体CeCoIn5和常规金属YbCoIn5交替块层（BLs）组成的超晶格，该方法独特地提供空间分辨的动态磁信息。我们发现反铁磁涨落的存在仅限于Ce块层，表明f电子的磁自由度在Yb块层内部被淬灭。与二维化增强涨落的简单预期相反，我们观察到反铁磁涨落随Ce块层厚度减小而快速抑制。而且，这种抑制在块层间的界面附近更为显著。这些结果意味着界面处局域反演对称性破缺的显著影响。
引用
@article{arxiv.1511.04209,
title = {The interface between heavy fermions and normal electrons investigated by spatially-resolved nuclear magnetic resonance},
author = {Takayoshi Yamanaka and Masaaki Shimozawa and Ryota Endo and Yuta Mizukam and Hiroaki Shishido and Takahito Terashima and Takasada Shibauchi and Yuji Matsuda and Kenji Ishida},
journal= {arXiv preprint arXiv:1511.04209},
year = {2016}
}
备注
5 pages, 4 figures, accepted for publication as a Rapid Communication in Physical Review B