Small energy scale for mixed-valent uranium materials

被引：26

作者：

Koga, M ^{[1
]}

Cox, DL ^{[1
]}

机构：

[1] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.82.2575

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate a two-channel Anderson impurity model with a 5f(1) magnetic and a 5f(2) quadrupolar ground doublet and a 5f(2) excited triplet. Using the numerical renormalization group method, we find a crossover to a non-Fermi-liquid state below a temperature T* varying as the 5f(2) triplet-doublet splitting to the 7/2 power. To within numerical accuracy, the nonlinear magnetic susceptibility and the 5f(1) contribution to the linear susceptibility are given by universal one-parameter scaling functions. These results may explain UBe13 as mixed valent with a small crossover scale T*. [S0031-9007(99)08723-2].

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页码：2575 / 2578

页数：4

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