Fermi level pinning of a massive electron state in YbBiPt

被引：22
|
作者：
Oppeneer, PM
Antonov, VN
Yaresko, AN
Perlov, AY
Eschrig, H
机构：
[1] Max-Planck Research Group “Theory of Complex and Correlated Electron Systems”, University of Technology, Dresden
来源：
PHYSICAL REVIEW LETTERS | 1997年 / 78卷 / 21期
关键词：
D O I：
10.1103/PhysRevLett.78.4079
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The electronic structure of the heavy fermion compound YbBiPt is investigated using energy band calculations which account for strong on-site f-electron Coulomb correlations. We find that in the very low free-electron-like density near the Fermi level one extremely narrow 4f state becomes pinned at the Fermi energy E-F. The pinned 4f state gives,in the presence of antiferromagnetism, rise to massive electron behavior for which we calculate an unenhanced Sommerfeld constant of 0.25 J mol(-1) K-2 maximally.
引用
收藏
页码：4079 / 4082
页数：4
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