Behavior of magnetic impurities in gapless Fermi systems

被引:95
作者
Ingersent, K [1 ]
机构
[1] NATL HIGH MAGNET FIELD LAB,TALLAHASSEE,FL
来源
PHYSICAL REVIEW B | 1996年 / 54卷 / 17期
关键词
D O I
10.1103/PhysRevB.54.11936
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In a number of systems, including certain semiconductors and unconventional superconductors, the effective density of states varies like \E-E(F)\(r) near the Fermi energy. The behavior of dilute magnetic impurities in such systems is studied using a nonperturbative renormalization-group approach. Close to particle-hole symmetry, the Kondo effect is suppressed for the cases of greatest relevance (r = 1 and 2). Away from this symmetry, any quenching of the impurity moment is accompanied by a low-temperature decrease in the impurity resistivity, rather than the increase found in metals.
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页码:11936 / 11939
页数:4
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