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arXiv 1606.08975cond-mat.mes-hall
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单杂质Anderson模型中局域$"$磁矩和非定态自旋极化电流的动力学

Kinetics of local $"$magnetic$"$ moment and non-stationary spin-polarized current in the single impurity Anderson-model

N. S. Maslova, V. N. Mantsevich, P. I. Arseyev

摘要:

我们进行理论研究的局域态动力学的存在下,与水库和库仑相关的相互作用。我们分析了考虑到高阶关联函数的本地化电子的电子占据数与不同的自旋的动力学方程。我们揭示了在定态中自旋相反的电子占据数总是相同的值-定态是一个$"$顺磁性的$"$。$"$磁$"$性质只能出现在单杂质Anderson模型的非定常特性和局域电子二阶关联函数的动力学中。我们发现,对于深能级和强库仑关联,初始$"$磁$"$态的弛豫时间比$"$顺磁$"$态的弛豫时间大几个数量级.因此,长寿命的$"$磁矩$"$可以存在于系统中。我们还发现,在特定的时间间隔内,不同的自旋在相反的方向流动的非稳态自旋极化电流。

英文摘要:

We perform theoretical investigation of the localized state dynamics in the presence of interaction with the reservoir and Coulomb correlations. We analyze kinetic equations for electron occupation numbers with different spins taking into account high order correlation functions for the localized electrons. We reveal that in the stationary state electron occupation numbers with the opposite spins always have the same value - the stationary state is a $"$paramagnetic$"$ one. $"$Magnetic$"$ properties can appear only in the non-stationary characteristics of the single-impurity Anderson model and in the dynamics of the localized electrons second order correlation functions. We found, that for deep energy levels and strong Coulomb correlations, relaxation time for initial $"$magnetic$"$ state can be several orders larger than for $"$paramagnetic$"$ one. So, long-living $"$magnetic$"$ moment can exist in the system. We also found non-stationary spin polarized currents flowing in opposite directions for the different spins in the particular time interval.

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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