Quantum phase transition and destruction of Kondo effect in pressurized SmB6
文献类型：期刊论文
| 作者 | Zhou, YZ; Wu, Q; Rosa, PFS; Yu, R; Guo, J; Yi, W; Zhang, S; Wang, Z; Wang, HH; Cai, S |
| 刊名 | SCIENCE BULLETIN
 |
| 出版日期 | 2017 |
| 卷号 | 62期号:21页码:1439-1444 |
| 关键词 | Heavy-fermion Metals Insulator Smb6 Surface-states Resistivity Gap |
| ISSN号 | 2095-9273 |
| DOI | 10.1016/j.scib.2017.10.008 |
| 文献子类 | 期刊论文 |
| 英文摘要 | SmB6 has been a well-known Kondo insulator for decades, but recently attracts extensive new attention as a candidate topological system. Studying SmB6 under pressure provides an opportunity to acquire the much-needed understanding about the effect of electron correlations on both the metallic surface state and bulk insulating state. Here we do so by studying the evolution of two transport gaps (low temperature gap E-l and high temperature gap E-h) associated with the Kondo effect by measuring the electrical resistivity under high pressure and low temperature (0.3 K) conditions. We associate the gaps with the bulk Kondo hybridization, and from their evolution with pressure we demonstrate an insulator-to-metal transition at similar to 4 GPa. At the transition pressure, a large change in the Hall number and a divergence tendency of the electron-electron scattering coefficient provide evidence for a destruction of the Kondo entanglement in the ground state. Our results raise the new prospect for studying topological electronic states in quantum critical materials settings. (C) 2017 Science China Press. Published by Elsevier B.V. and Science China Press. All rights reserved. |
| WOS关键词 | HEAVY-FERMION METALS ; INSULATOR SMB6 ; SURFACE-STATES ; RESISTIVITY ; GAP |
| 语种 | 英语 |
| WOS记录号 | WOS:000416211200005 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/28788]  |
| 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 | Zhou, YZ,Wu, Q,Rosa, PFS,et al. Quantum phase transition and destruction of Kondo effect in pressurized SmB6[J]. SCIENCE BULLETIN,2017,62(21):1439-1444. |
| APA | Zhou, YZ.,Wu, Q.,Rosa, PFS.,Yu, R.,Guo, J.,...&Sun, LL.(2017).Quantum phase transition and destruction of Kondo effect in pressurized SmB6.SCIENCE BULLETIN,62(21),1439-1444. |
| MLA | Zhou, YZ,et al."Quantum phase transition and destruction of Kondo effect in pressurized SmB6".SCIENCE BULLETIN 62.21(2017):1439-1444. |
入库方式： OAI收割
来源：上海应用物理研究所
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