CAS OpenIR  > 中科院上海应用物理研究所2011-2018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; Yang, K; Li, AG; Jiang, Z; Zhang, S; Wei, XJ; Huang, YY; Sun, PJ; Yang, YF; Fisk, Z; Si, QM; Zhao, ZX; Sun, LL
2017
Source PublicationSCIENCE BULLETIN
ISSN2095-9273
Volume62Issue:21Pages:1439-1444
Subtype期刊论文
AbstractSmB6 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.
KeywordHeavy-fermion Metals Insulator Smb6 Surface-states Resistivity Gap
DOI10.1016/j.scib.2017.10.008
WOS KeywordHEAVY-FERMION METALS ; INSULATOR SMB6 ; SURFACE-STATES ; RESISTIVITY ; GAP
Indexed BySCI
Language英语
WOS IDWOS:000416211200005
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/28788
Collection中科院上海应用物理研究所2011-2018年
Recommended Citation
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.
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