2015年12月
Interface between heavy fermions and normal electrons investigated by spatially resolved nuclear magnetic resonance
PHYSICAL REVIEW B
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- 巻
- 92
- 号
- 24
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1103/PhysRevB.92.241105
- 出版者・発行元
- AMER PHYSICAL SOC
We have studied the superlattices with alternating block layers (BLs) of heavy-fermion superconductor CeCoIn5 and conventional-metal YbCoIn5 by site-selective nuclear magnetic resonance spectroscopy, which uniquely offers spatially resolved dynamical magnetic information. We find that the presence of antiferromagnetic fluctuations is confined to the Ce BLs, indicating that magnetic degrees of freedom of f electrons are quenched inside the Yb BLs. Contrary to simple expectations that the two dimensionalization enhances fluctuations, we observe that antiferromagnetic fluctuations are rapidly suppressed with decreasing Ce BL thickness. Moreover, the suppression is more prominent near the interfaces between the BLs. These results imply significant effects of local inversion symmetry breaking at the interfaces.
- リンク情報
- ID情報
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- DOI : 10.1103/PhysRevB.92.241105
- ISSN : 1098-0121
- eISSN : 1550-235X
- Web of Science ID : WOS:000366093000001