Electronic structure of the heavy fermion metal LiV2O4

被引:108
作者
Anisimov, VI
Korotin, MA
Zölfl, M
Pruschke, T
Le Hur, K
Rice, TM
机构
[1] Inst Met Phys, Ekaterinburg, Russia
[2] Univ Regensburg, D-8400 Regensburg, Germany
[3] ETH Honggerberg, CH-8093 Zurich, Switzerland
关键词
D O I
10.1103/PhysRevLett.83.364
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The electronic structure of the first reported heavy fermion compound without f electrons, LiV2O4, was studied by an ab initio calculation method. As a result of the trigonal splitting and d-d Coulomb interaction, one electron of the d(1.5) configuration of the V ion is localized and the rest partially fills a relatively broad conduction band. The effective Anderson impurity model was solved by the noncrossing-approximation method, leading to an estimation for the single-site Kondo energy scale T-K. Then, we show how the so-called exhaustion phenomenon of Nozieres for the Kondo lattice leads to a remarkable decrease of the heavy-fermion (or coherence) energy scale T-coh equivalent to T-K(2)/D (D is the typical bandwidth), comparable to the experimental result.
引用
收藏
页码:364 / 367
页数:4
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