Hybridization gap in Kondo insulators CeRhSb and CeRhAs studied by ultrahigh-resolution photoemission spectroscopy

H. Kumigashira; T. Takahashi; S. Yoshii; M. Kasaya

doi:10.1016/S0921-4526(01)01084-5

Hybridization gap in Kondo insulators CeRhSb and CeRhAs studied by ultrahigh-resolution photoemission spectroscopy

H. Kumigashira, T. Takahashi, S. Yoshii, M. Kasaya

Tohoku University

Research output: Contribution to journal › Conference article › peer-review

3 Citations (Scopus)

Abstract

Ultrahigh-resolution photoemission spectroscopy (ΔE∼8 meV) has been performed on Kondo insulators CeRhAs and CeRhSb. We found that the 4f-derived density of states shows a depletion (pseudogap) at E_F in contrast to metallic Kondo materials. It was also found that the size of both 4f-derived and conduction-electron derived pseudogaps scales well with the Kondo temperature.

Original language	English
Pages (from-to)	208-209
Number of pages	2
Journal	Physica B: Condensed Matter
Volume	312-313
DOIs	https://doi.org/10.1016/S0921-4526(01)01084-5
Publication status	Published - 2002 Mar
Event	International Conference on Strongly Correlated Electrons - Ann Arbor, MI, United States Duration: 2002 Aug 6 → 2002 Aug 6

Keywords

CeRhAs
CeRhSb
Kondo insulator
Photoemission

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10.1016/S0921-4526(01)01084-5

Cite this

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title = "Hybridization gap in Kondo insulators CeRhSb and CeRhAs studied by ultrahigh-resolution photoemission spectroscopy",

abstract = "Ultrahigh-resolution photoemission spectroscopy (ΔE∼8 meV) has been performed on Kondo insulators CeRhAs and CeRhSb. We found that the 4f-derived density of states shows a depletion (pseudogap) at EF in contrast to metallic Kondo materials. It was also found that the size of both 4f-derived and conduction-electron derived pseudogaps scales well with the Kondo temperature.",

keywords = "CeRhAs, CeRhSb, Kondo insulator, Photoemission",

author = "H. Kumigashira and T. Takahashi and S. Yoshii and M. Kasaya",

note = "Funding Information: HK thanks the Japan Society for Promotion of Science for financial support. This work was supported by a grant from the Ministry of Education, Science, and Culture of Japan.; International Conference on Strongly Correlated Electrons ; Conference date: 06-08-2002 Through 06-08-2002",

year = "2002",

month = mar,

doi = "10.1016/S0921-4526(01)01084-5",

language = "English",

volume = "312-313",

pages = "208--209",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Hybridization gap in Kondo insulators CeRhSb and CeRhAs studied by ultrahigh-resolution photoemission spectroscopy

AU - Kumigashira, H.

AU - Takahashi, T.

AU - Yoshii, S.

AU - Kasaya, M.

N1 - Funding Information: HK thanks the Japan Society for Promotion of Science for financial support. This work was supported by a grant from the Ministry of Education, Science, and Culture of Japan.

PY - 2002/3

Y1 - 2002/3

N2 - Ultrahigh-resolution photoemission spectroscopy (ΔE∼8 meV) has been performed on Kondo insulators CeRhAs and CeRhSb. We found that the 4f-derived density of states shows a depletion (pseudogap) at EF in contrast to metallic Kondo materials. It was also found that the size of both 4f-derived and conduction-electron derived pseudogaps scales well with the Kondo temperature.

AB - Ultrahigh-resolution photoemission spectroscopy (ΔE∼8 meV) has been performed on Kondo insulators CeRhAs and CeRhSb. We found that the 4f-derived density of states shows a depletion (pseudogap) at EF in contrast to metallic Kondo materials. It was also found that the size of both 4f-derived and conduction-electron derived pseudogaps scales well with the Kondo temperature.

KW - CeRhAs

KW - CeRhSb

KW - Kondo insulator

KW - Photoemission

UR - http://www.scopus.com/inward/record.url?scp=0036504185&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036504185&partnerID=8YFLogxK

U2 - 10.1016/S0921-4526(01)01084-5

DO - 10.1016/S0921-4526(01)01084-5

M3 - Conference article

AN - SCOPUS:0036504185

SN - 0921-4526

VL - 312-313

SP - 208

EP - 209

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

T2 - International Conference on Strongly Correlated Electrons

Y2 - 6 August 2002 through 6 August 2002

ER -

Hybridization gap in Kondo insulators CeRhSb and CeRhAs studied by ultrahigh-resolution photoemission spectroscopy

Abstract

Keywords

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