THEORY OF ONE-CHANNEL VERSUS MULTICHANNEL KONDO EFFECTS FOR CE3+ IMPURITIES

被引：50

作者：

KIM, TS

COX, DL

机构：

[1] Department of Physics, Ohio State University, Columbus

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 75卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.75.1622

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We introduce a model for Ce3+ impurities in cubic metals which exhibits competition between the Fermi-liquid fixed point of the single-channel Kondo model and the non-Fermi-liquid fixed point of the two- and three-channel Kondo models. Using the noncrossing approximation and scaling theory, we find the following: (i) A possible three-channel Kondo effect between the one- and two-channel regimes in parameter space. (ii) The sign of the thermopower is a fixed point diagnostic. (iii) Our results will likely survive the introduction of additional f(2) and conduction states. We apply this model to interpret the non-Fermi-liquid alloy La1-xCexCu2.2Si2.

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收藏

页码：1622 / 1625

页数：4

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