Correlated electronic states of Yb4As3 studied with photoemission

被引：0

作者：

Suga, S

Harada, H

Iwasaki, T

Muro, T

Matsushita, T

Sekiyama, A

Imada, S

Daimon, H

Ishii, H

Fujimori, A

Ochiai, A

Suzuki, T

机构：

[1] Osaka Univ, Grad Sch Engn Sci, Dept Mat Phys, Toyonaka, Osaka 560, Japan

[2] Tokyo Metropolitan Univ, Fac Sci, Dept Phys, Hachioji, Tokyo 19203, Japan

[3] Univ Tokyo, Fac Sci, Dept Phys, Bunkyo Ku, Tokyo 113, Japan

[4] Niigata Univ, Fac Engn, Dept Mat Engn, Niigata 95021, Japan

[5] Tohoku Univ, Fac Sci, Dept Phys, Sendai, Miyagi 98077, Japan

来源：

JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA | 1998年 / 88卷

关键词：

high resolution photoemission; charge ordering; 4f electron; structural phase transition; heavy fermion;

D O I：

10.1016/S0368-2048(97)00146-1

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

By means of high resolution photoemission spectroscopy, clear changes of the Yb 4f spectra with temperature are observed in Yb4As3 The photoemission intensity, which is very low at the Fermi level, decreases as the temperature is lowered in accord with the narrowing of the 4f spectra. The Yb2+ 4f state is stabilized along three [111] long chains and the Yb3+ 4f sate is stabilized along a short [111] chain, resulting from the charge ordering accompanying the structural phase transition. A new model is proposed which describes the changes of electronic states with charge ordering. Studies of Yb-4(As1-xSbx)(3) mixed crystals confirm the present interpretation. (C) 1998 Elsevier Science B.V.

引用

页码：315 / 319

页数：5

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