Valence Fluctuation in YbAgCu4 at highmagnetic fields

Valence Fluctuation in YbAgCu4 at highmagnetic fields
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高磁场下 YbAgCu4 的价态涨落

DOI:
10.1143/jpsj.81.015002
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发表时间:
2012
期刊:
J. Phys. Soc. Jpn.
影响因子:
--
通讯作者:
and K. Yoshimura
and K. Yoshimura
中科院分区:
--
文献类型:
--
作者:
Y. H. Matsuda;T. Nakamura;J.-L. Her;S. Michimura;T. Inami;M. Mizumaki;N. Kawamura;M. Suzuki;B. Chen;H. Ohta;and K. Yoshimura

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The occupation number of an f-electron (nf) in heavy fermion compounds is close to unity (nf $1) but deviates slightly from 1 because of the strong interaction with the conduction electrons. According to the Gutzwiller approximation, the deviation 1 Ā nf can be expressed by 1 Ā nf ž kTÃ F= Ā, where kTÃ F and Ā correspond to the kinetic energy with the electron interaction and that without the interaction, respectively. 1) Because the f-electrons in a heavy fermion state are almost localized, kT Ã