On the origin of heavy quasiparticles in LiV2O4

被引：55

作者：

Fulde, P

Yaresko, AN

Zvyagin, AA

Grin, Y

机构：

[1] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany

[2] Max Planck Inst Chem Phys Fester Stoffe, D-01187 Dresden, Germany

[3] Natl Acad Sci Ukraine, Inst Met Phys, UA-01142 Kiev, Ukraine

[4] Natl Acad Sci Ukraine, BI Verkin Inst Low Temp Phys & Engn, UA-61164 Kharkov, Ukraine

来源：

EUROPHYSICS LETTERS | 2001年 / 54卷 / 06期

关键词：

D O I：

10.1209/epl/i2001-00322-3

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

An explanation is provided for the heavy quasiparticle excitations in LiV2O4. It differs considerably from that of other known heavy-fermion systems. Main ingredients of our theory are the cubic spinel structure of the material and strong short-range correlations of the d electrons. The large gamma coefficient is shown to result from excitations of Heisenberg spin 1/2 rings and chains. The required coupling constant is calculated from LDA+U calculations and is found to be of the right size. Also the calculated Sommerfeld-Wilson ratio is reasonably close to the observed one.

引用

页码：779 / 785

页数：7

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