Stability of the Spin-Charge Composite Order Phase in an Extended Kondo Lattice Model with General Band Filling

被引：1
|
作者：
Shiina, Ryousuke [1 ]
机构：
[1] Univ Ryukyus, Dept Phys & Earth Sci, Nishihara, Okinawa 9030213, Japan
来源：
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2018年 / 87卷 / 08期
关键词：
D O I：
10.7566/JPSJ.87.084704
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The phase diagram of an extended Kondo lattice model for SmRu(4)P(12 )is investigated in the variation of the conduction-electron density within the mean-field approximation. It is found that the antiferromagnetic insulating phase at half lilling becomes unstable for hole doping and replaced by a novel spin charge composite order phase in a low- and intermediate-doping region. The stability mechanism of the phases is discussed in view of unconventional spin-dependent quasiparticle states in the composite phase. The relevances of the theory to the ordered phases in SmRu4P12 and other Ce and Sm compounds are discussed.
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页数：7
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