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DOI | 10.1038/s41467-018-03613-1 |
Screened moments and extrinsic in-gap states in samarium hexaboride | |
Fuhrman, W. T.1,2; Chamorro, J. R.1,2,3; Alekseev, P. A.4,5; Mignot, J. -M.6; Keller, T.7,8; Rodriguez-Rivera, J. A.9,10; Qiu, Y.10; Nikolic, P.1,2,11; McQueen, T. M.1,2,3,12; Broholm, C. L.1,2,12 | |
2018-04-18 | |
发表期刊 | NATURE COMMUNICATIONS |
ISSN | 2041-1723 |
出版年 | 2018 |
卷号 | 9 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Russia; France; Germany |
英文摘要 | Samarium hexaboride (SmB6) is a Kondo insulator, with a narrow gap due to hybridization between localized and conduction electrons. Despite being an insulator, many samples show metal-like properties. Rare-earth purification is exceedingly difficult, and nominally pure samples may contain 2% or more of impurities. Here to determine the effects of rare-earth doping on SmB6, we synthesized and probed a series of gadolinium-doped samples. We found a relationship between specific heat and impurity moment screening which scales systematically. Consistent with this finding, our neutron scattering experiments of a high purity sample of doubly isotopic (SmB6)-Sm-154-B-11 show no intrinsic excitations below the well-established 13 meV spin-exciton. The result of introducing impurities into a Kondo insulator is incompletely understood, but it is clear from our measurements that there is a systematic relationship between rare-earth impurities and metal-like properties in SmB6. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000430286800014 |
WOS关键词 | PHYSICAL-PROPERTIES ; SMB6 ; EXCITATIONS ; SCATTERING ; SURFACE ; IONS ; EU |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/203729 |
专题 | 资源环境科学 |
作者单位 | 1.Johns Hopkins Univ, Inst Quantum Matter, Baltimore, MD 21218 USA; 2.Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA; 3.Johns Hopkins Univ, Dept Chem, Charles & 34Th St, Baltimore, MD 21218 USA; 4.Natl Res Ctr, Kurchatov Inst, Moscow 123182, Russia; 5.Natl Res Nucl Univ MEPhI, Moscow 115409, Russia; 6.CEA Saclay, CNRS, CEA, Lab Leon Brillouin, F-91191 Gif Sur Yvette, France; 7.Max Planck Inst Festkorperforsch, Heisenbergstr 1, D-70569 Stuttgart, Germany; 8.Max Planck Soc Forschungsneutronenquelle Heinz Ma, D-85747 Garching, Germany; 9.Univ Maryland, Dept Mat Sci, College Pk, MD 20742 USA; 10.NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA; 11.George Mason Univ, Sch Phys Astron & Computat Sci, Fairfax, VA 22030 USA; 12.Johns Hopkins Univ, Dept Mat Sci & Engn, Baltimore, MD 21218 USA |
推荐引用方式 GB/T 7714 | Fuhrman, W. T.,Chamorro, J. R.,Alekseev, P. A.,et al. Screened moments and extrinsic in-gap states in samarium hexaboride[J]. NATURE COMMUNICATIONS,2018,9. |
APA | Fuhrman, W. T..,Chamorro, J. R..,Alekseev, P. A..,Mignot, J. -M..,Keller, T..,...&Broholm, C. L..(2018).Screened moments and extrinsic in-gap states in samarium hexaboride.NATURE COMMUNICATIONS,9. |
MLA | Fuhrman, W. T.,et al."Screened moments and extrinsic in-gap states in samarium hexaboride".NATURE COMMUNICATIONS 9(2018). |
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