Direct observation of how the heavy-fermion state develops in CeCoIn5
文献类型：期刊论文
| 作者 | Chen, QY; Xu, DF; Niu, XH; Jiang, J; Peng, R; Xu, HC; Wen, CHP; Ding, ZF; Huang, K; Shu, L |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2017 |
| 卷号 | 96期号:4页码:- |
| 关键词 | Pseudogap Critical-point Quantum-critical-point Kondo-lattice Superconductor Surface Resistivity Transition Ybrh2si2 Systems Metals |
| ISSN号 | 2469-9950 |
| DOI | 10.1103/PhysRevB.96.045107 |
| 文献子类 | 期刊论文 |
| 英文摘要 | Heavy-fermion systems share some of the strange metal phenomenology seen in other unconventional superconductors, providing a unique opportunity to set strange metals in a broader context. Central to understanding heavy-fermion systems is the interplay of localization and itinerancy. These materials acquire high electronic masses and a concomitant Fermi volume increase as the f electrons delocalize at low temperatures. However, despite thewide-spread acceptance of this view, a direct microscopic verification has been lacking. Here we report high-resolution angle-resolved photoemission measurements on CeCoIn5, a prototypical heavy-fermion compound, which spectroscopically resolve the development of band hybridization and the Fermi surface expansion over a wide temperature region. Unexpectedly, the localized-to-itinerant transition occurs at surprisingly high temperatures, yet f electrons are still largely localized even at the lowest temperature. These findings point to an unanticipated role played by crystal-field excitations in the strange metal behavior of CeCoIn5. Our results offer a comprehensive experimental picture of the heavy-fermion formation, setting the stage for understanding the emergent properties, including unconventional superconductivity, in this and related materials. |
| WOS关键词 | PSEUDOGAP CRITICAL-POINT ; QUANTUM-CRITICAL-POINT ; KONDO-LATTICE ; SUPERCONDUCTOR ; SURFACE ; RESISTIVITY ; TRANSITION ; YBRH2SI2 ; SYSTEMS ; METALS |
| 语种 | 英语 |
| WOS记录号 | WOS:000405027800007 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/28608]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 推荐引用方式 GB/T 7714 | Chen, QY,Xu, DF,Niu, XH,et al. Direct observation of how the heavy-fermion state develops in CeCoIn5[J]. PHYSICAL REVIEW B,2017,96(4):-. |
| APA | Chen, QY.,Xu, DF.,Niu, XH.,Jiang, J.,Peng, R.,...&Feng, DL.(2017).Direct observation of how the heavy-fermion state develops in CeCoIn5.PHYSICAL REVIEW B,96(4),-. |
| MLA | Chen, QY,et al."Direct observation of how the heavy-fermion state develops in CeCoIn5".PHYSICAL REVIEW B 96.4(2017):-. |
入库方式： OAI收割
来源：上海应用物理研究所
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