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

被引：2

作者：

Kumigashira, H ^{[1
]}

Takahashi, T ^{[1
]}

Yoshii, S ^{[1
]}

Kasaya, M ^{[1
]}

机构：

[1] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan

来源：

PHYSICA B-CONDENSED MATTER | 2002年 / 312卷

关键词：

CeRhsb; CeRhAs; Kondo insulator; photoemission;

D O I：

10.1016/S0921-4526(01)01084-5

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Ultrahigh-resolution photoemission spectroscopy (DeltaEsimilar to8 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. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：208 / 209

页数：2

共 8 条

[1]

Aeppli G., 1992, Comments Condens. Matter Phys., V16, P155

[2] Photoemission study of the Kondo insulator Ce3Bi4Pt3 [J].

Breuer, K ;

Messerli, S ;

Purdie, D ;

Garnier, M ;

Hengsberger, M ;

Panaccione, G ;

Baer, Y ;

Takahashi, T ;

Yoshii, S ;

Kasaya, M ;

Katoh, K ;

Takabatake, T .

EUROPHYSICS LETTERS, 1998, 41 (05) :565-570

[3]

GROER C, 1998, PHYS REV B, V57, P12659

[4] Spectral evidence for pseudogap formation in Kondo insulators CeRhAs and CeRhSb [J].

Kumigashira, H ;

Sato, T ;

Yokoya, T ;

Takahashi, T ;

Yoshii, S ;

Kasaya, M .

PHYSICAL REVIEW LETTERS, 1999, 82 (09) :1943-1946

[5] Recent developments in high-energy spectroscopies of Kondo systems [J].

Malterre, D ;

Grioni, M ;

Baer, Y .

ADVANCES IN PHYSICS, 1996, 45 (04) :299-348

[6] Transfer of spectral weight in spectroscopies of correlated electron systems [J].

Rozenberg, MJ ;

Kotliar, G ;

Kajueter, H .

PHYSICAL REVIEW B, 1996, 54 (12) :8452-8468

[7] Ce- and Yb-based Kondo semiconductors [J].

Takabatake, T ;

Iga, F ;

Yoshino, T ;

Echizen, Y ;

Katoh, K ;

Kobayashi, K ;

Higa, M ;

Shimizu, N ;

Bando, Y ;

Nakamoto, G ;

Fujii, H ;

Izawa, K ;

Suzuki, T ;

Fujita, T ;

Sera, M ;

Hiroi, M ;

Maezawa, K ;

Mock, S ;

Von Lohneysen, H ;

Bruckl, A ;

Neumaier, K ;

Andres, K .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1998, 177 :277-282

[8] ATOMIC SUBSHELL PHOTOIONIZATION CROSS-SECTIONS AND ASYMMETRY PARAMETERS - 1 LESS-THAN-OR-EQUAL-TO Z LESS-THAN-OR-EQUAL-TO 103 [J].

YEH, JJ ;

LINDAU, I .

ATOMIC DATA AND NUCLEAR DATA TABLES, 1985, 32 (01) :1-155

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