Quantum phase transition and destruction of Kondo effect in pressurized SmB6

doi:10.1016/j.scib.2017.10.008

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	Quantum phase transition and destruction of Kondo effect in pressurized SmB6
	Zhou, YZ; Wu, Q; Rosa, PFS; Yu, R; Guo, J; Yi, W; Zhang, S; Wang, Z; Wang, HH; Cai, S
刊名	SCIENCE BULLETIN
	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
内容类型	期刊论文
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.