Anomalous phase diagram of filled skutterudite CeOs4Sb12 under external magnetic field

Anomalous phase diagram of filled skutterudite CeOs4Sb12 under external magnetic field
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外磁场下填充方钴矿CeOs4Sb12反常相图

DOI:
10.1016/j.jmmm.2006.10.020
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发表时间:
2007
影响因子:
2.7
通讯作者:
T. Saso
T. Saso
中科院分区:
材料科学3区
文献类型:
--
作者:
Yoshiki Imai;K. Sakurazawa;T. Saso

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研究了在CeOs_4Sb_(12)中观察到的反常金属-绝缘体转变。通过建立低能有效模型,采用无规相近似(RPA),计算了体系的磁化率,确定了体系的相图。当能带结构接近完美嵌套且态密度随外场变化剧烈时,在低能区,有序矢量Q=2π(1,0,0)的横向磁化率增强.因此,磁场稳定自旋密度波(SDW)相,这是与实验结果一致。
Anomalous metal-insulator transition observed in CeOs4Sb12is investigated. By constructing the low-energy effective model and employing the random phase approximation (RPA), the magnetic susceptibilities are calculated and the phase diagram is determined. When the band structure is close to perfect nesting and the drastic change of the density of states with respect to the external field occurs at the low energy regime, transverse susceptibility with ordering vector Q=2π(1,0,0) is enhanced. Thus the magnetic field stabilizes the spin density wave (SDW) phase, which is consistent with the experimental results.
DOI: 10.1103/physrevb.71.125127
发表时间: 2004-12
期刊: Physical Review B
影响因子: 3.7
作者:
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通讯作者: H. Sugawara;S. Osaki;M. Kobayashi;T. Namiki;S. Saha;Y. Aoki;H. Sato
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DOI: --
发表时间: 2005
期刊: J.Phys.Soc.Jpn. 74(1)
影响因子: --
作者:
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通讯作者: 櫻沢啓太郎 他
DOI: 10.1103/physrevb.65.100506
发表时间: 2002-03-01
期刊: PHYSICAL REVIEW B
影响因子: 3.7
作者:
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通讯作者: Maple, MB