ORBITAL KONDO EFFECT IN CEXLA1-XB6 : SCALING ANALYSIS
ORBITAL KONDO EFFECT IN CEXLA1-XB6 : SCALING ANALYSIS
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CEXLA1-XB6 中的轨道近藤效应：标度分析
DOI：
10.1103/physrevb.59.1902
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发表时间：
1998
影响因子：
3.7
通讯作者：
Y. Kuramoto
中科院分区：
文献类型：
--
作者：
H. Kusunose;Y. Kuramoto
本文从三阶标度方程出发，研究了Ce_xLa_{1-x} B_（6）中近藤效应的特殊性。对于除了f^1 $-f^0 $电荷涨落之外还有f^1 $-f^2 $电荷涨落的情况，有效交换相互作用相对于代表基态中两个不同轨道的轨道赝自旋变得各向异性。由于电张量和磁张量的特征能量不同，单一近藤温度的标度不适用于电阻率和磁化率等物理量。指出了RKKY相互作用导致自旋有序而轨道有序的可能性。该相作为相IV的候选相，所述相IV被观察为磁性各向同性。
Peculiarity of the Kondo effect in Ce$_x$La$_{1-x}$B$_6$ is investigated on the basis of the scaling equations up to third order. For the case where the $f^1$-$f^2$ charge fluctuation enters in addition to the $f^1$-$f^0$ one, the effective exchange interaction becomes anisotropic with respect to the orbital pseudospins which represent the two different orbitals in the $\Gamma_8$ ground state. Because of different characteristic energies for electric and magnetic tensors, scaling with the single Kondo temperature does not apply to physical quantities such as the resistivity and magnetic susceptibility. Possibility of a bizzare phase is pointed out where the RKKY interaction leads to the spin ordering without orbital ordering. This phase serves as a candidate of the phase IV which is observed to be isotropic magnetically.