Temperature dependence of the Kondo resonance in the photoemission spectra of the heavy-fermion compounds YbXCu4 (X = Mg, Cd, and Sn)

被引：7

作者：

Anzai, Hiroaki ^{[1
]}

Morikawa, Kohei ^{[1
]}

Shiono, Hiroto ^{[1
]}

Sato, Hitoshi ^{[2
]}

Ideta, Shin-ichiro ^{[3
]}

Tanaka, Kiyohisa ^{[3
]}

Zhuang, Tao ^{[4
]}

Matsumoto, Keisuke T. ^{[4
]}

Hiraoka, Koichi ^{[4
]}

机构：

[1] Osaka Prefecture Univ, Grad Sch Engn, Sakai, Osaka 5998531, Japan

[2] Hiroshima Univ, Hiroshima Synchrotron Radiat Ctr, Higashihiroshima 7390046, Japan

[3] Inst Mol Sci, UVSOR Synchrotron Facil, Okazaki, Aichi 4448585, Japan

[4] Ehime Univ, Grad Sch Sci & Engn, Matsuyama, Ehime 7908577, Japan

来源：

PHYSICAL REVIEW B | 2020年 / 101卷 / 23期

关键词：

YBINCU4;

D O I：

10.1103/PhysRevB.101.235160

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report a temperature-dependent study of Kondo resonance in the heavy-fermion compounds YbXCu4 with X = Mg, Cd, and Sn. A sharp peak of the Yb2+ 4f (7/2) state has been observed in photoemission spectra, and its energy position in the limit of zero temperature is in agreement with the energy scale of the Kondo temperature T-K. The peak develops in the form of a dispersionless peak with large spectral weight at T-coh well below T-K. The onset temperature of the robust Kondo state is comparable to the temperature at a local maximum in magnetic susceptibility. This nontrivial development of changes in the Kondo resonance at T-coh demonstrates the formation of the coherent heavy-fermion state.

引用

页数：7

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