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arXiv 0708.1950cond-mat.str-el
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反铁磁金属中的近藤效应

Kondo effect in an Antiferromagnetic metal

Vivek Aji, Chandra Varma, Ilya Vekhter

摘要:

通过重整化群分析和变分计算,研究了自旋为1/2的杂质在巡游反铁磁金属相中的命运。反铁磁金属中的局域磁矩-传导电子相互作用哈密顿量是自旋不守恒的。我们发现,对于一般的位置的杂质,近藤奇性仍然发生,但基态有一个部分未屏蔽的时刻。我们计算了这种剩余力矩的大小和自旋极化随能量的变化作为交错磁化的函数的替代杂质。通常的近藤效应只有在杂质位于磁化强度为零的点时才会发生。

英文摘要:

We study the fate of a spin-1/2 impurity in the itinerant antiferromagnetic metallic phase via a renormalization group analysis and a variational calculation. The local moment - conduction electron interaction hamiltonian in an antiferromagnetic metal is spin non-conserving. We show that for a general location of the impurity, the Kondo singularities still occur, but the ground state has a partially unscreened moment. We calculate the magnitude of this residual moment and the variation of the spin polarization with energy for a substitutional impurity as a function of the staggered magnetization. The usual Kondo effect only occurs if the impurity is placed at points where the magnetization is zero.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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