MODIFIED EXCHANGE INTERACTIONS IN DILUTE ALLOYS

被引:21
作者
BLACKMAN, JA
ELLIOTT, RJ
机构
来源
JOURNAL OF PHYSICS PART C SOLID STATE PHYSICS | 1969年 / 2卷 / 09期
关键词
D O I
10.1088/0022-3719/2/9/317
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
The Rudermann-Kittel interaction between spins centred on two impurity atoms in a crystal is examined by a Green function method. Since the impurity atoms have different spin-independent potentials the local charge density is changed and this modifies the R-K interaction. In general there is a change in amplitude and a phase change in the oscillations. Calculations have been made using the free electron model and the tight-binding model for a simple cubic lattice, assuming that the defects cause a change of potential which is short range. It is found that large enhancements of the interaction can occur if the defect gives a resonance close to the Fermi energy. Possible experiments whose interpretation is affected by these effects are discussed.
引用
收藏
页码:1670 / +
页数:1
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