$Hybridization, Inter-Ion Correlation, and Surface States in the Kondo Insulator SmB_{6}$
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Hybridization, Inter-Ion Correlation, and Surface States in the Kondo Insulator SmB_{6}

As an exemplary Kondo insulator, SmB_{6} has been studied for several decades. However, direct evidence for the development of the Kondo coherent state and for the evolution of the electronic structure in the material has not been obtained due to the compound’s rather complicated electronic and ther...

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Autores principales:	Xiaohang Zhang, N. P. Butch, P. Syers, S. Ziemak, Richard L. Greene, Johnpierre Paglione
Formato:	article
Lenguaje:	EN
Publicado:	American Physical Society 2013
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/99d6050858a54f1bb6402d268f55b61d
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spelling	oai:doaj.org-article:99d6050858a54f1bb6402d268f55b61d2021-12-02T11:29:27ZHybridization, Inter-Ion Correlation, and Surface States in the Kondo Insulator SmB_{6}10.1103/PhysRevX.3.0110112160-3308https://doaj.org/article/99d6050858a54f1bb6402d268f55b61d2013-02-01T00:00:00Zhttp://doi.org/10.1103/PhysRevX.3.011011http://doi.org/10.1103/PhysRevX.3.011011https://doaj.org/toc/2160-3308As an exemplary Kondo insulator, SmB_{6} has been studied for several decades. However, direct evidence for the development of the Kondo coherent state and for the evolution of the electronic structure in the material has not been obtained due to the compound’s rather complicated electronic and thermal transport behavior. Recently, these open questions have attracted increasing attention as the emergence of a time-reversal-invariant topological surface state in the Kondo insulator has been suggested. Here, we use point-contact spectroscopy to reveal the temperature dependence of the electronic states in SmB_{6}. We demonstrate that SmB_{6} is a model Kondo insulator: Below 100 K, the conductance spectra reflect the Kondo hybridization of Sm ions, but, below about 30 K, signatures of inter-ion correlation effects clearly emerge. Moreover, we find evidence that the low-temperature insulating state of this exemplary Kondo-lattice compound harbors conduction states on the surface, in support of predictions of nontrivial topology in Kondo insulators.Xiaohang ZhangN. P. ButchP. SyersS. ZiemakRichard L. GreeneJohnpierre PaglioneAmerican Physical SocietyarticlePhysicsQC1-999ENPhysical Review X, Vol 3, Iss 1, p 011011 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 Xiaohang Zhang N. P. Butch P. Syers S. Ziemak Richard L. Greene Johnpierre Paglione Hybridization, Inter-Ion Correlation, and Surface States in the Kondo Insulator SmB_{6}
description	As an exemplary Kondo insulator, SmB_{6} has been studied for several decades. However, direct evidence for the development of the Kondo coherent state and for the evolution of the electronic structure in the material has not been obtained due to the compound’s rather complicated electronic and thermal transport behavior. Recently, these open questions have attracted increasing attention as the emergence of a time-reversal-invariant topological surface state in the Kondo insulator has been suggested. Here, we use point-contact spectroscopy to reveal the temperature dependence of the electronic states in SmB_{6}. We demonstrate that SmB_{6} is a model Kondo insulator: Below 100 K, the conductance spectra reflect the Kondo hybridization of Sm ions, but, below about 30 K, signatures of inter-ion correlation effects clearly emerge. Moreover, we find evidence that the low-temperature insulating state of this exemplary Kondo-lattice compound harbors conduction states on the surface, in support of predictions of nontrivial topology in Kondo insulators.
format	article
author	Xiaohang Zhang N. P. Butch P. Syers S. Ziemak Richard L. Greene Johnpierre Paglione
author_facet	Xiaohang Zhang N. P. Butch P. Syers S. Ziemak Richard L. Greene Johnpierre Paglione
author_sort	Xiaohang Zhang
title	Hybridization, Inter-Ion Correlation, and Surface States in the Kondo Insulator SmB_{6}
title_short	Hybridization, Inter-Ion Correlation, and Surface States in the Kondo Insulator SmB_{6}
title_full	Hybridization, Inter-Ion Correlation, and Surface States in the Kondo Insulator SmB_{6}
title_fullStr	Hybridization, Inter-Ion Correlation, and Surface States in the Kondo Insulator SmB_{6}
title_full_unstemmed	Hybridization, Inter-Ion Correlation, and Surface States in the Kondo Insulator SmB_{6}
title_sort	hybridization, inter-ion correlation, and surface states in the kondo insulator smb_{6}
publisher	American Physical Society
publishDate	2013
url	https://doaj.org/article/99d6050858a54f1bb6402d268f55b61d
work_keys_str_mv	AT xiaohangzhang hybridizationinterioncorrelationandsurfacestatesinthekondoinsulatorsmb6 AT npbutch hybridizationinterioncorrelationandsurfacestatesinthekondoinsulatorsmb6 AT psyers hybridizationinterioncorrelationandsurfacestatesinthekondoinsulatorsmb6 AT sziemak hybridizationinterioncorrelationandsurfacestatesinthekondoinsulatorsmb6 AT richardlgreene hybridizationinterioncorrelationandsurfacestatesinthekondoinsulatorsmb6 AT johnpierrepaglione hybridizationinterioncorrelationandsurfacestatesinthekondoinsulatorsmb6
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Hybridization, Inter-Ion Correlation, and Surface States in the Kondo Insulator SmB_{6}

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