Magnetotransport through a strongly interacting quantum dot

被引：81

作者：

Costi, TA ^{[1
]}

机构：

[1] Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France

来源：

PHYSICAL REVIEW B | 2001年 / 64卷 / 24期

关键词：

D O I：

10.1103/PhysRevB.64.241310

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the effect of a magnetic field on the conductance through a strongly interacting quantum dot by using the finite temperature extension of Wilson's numerical renormalization group method to dynamical quantities. The quantum dot has one active level for transport and is modeled by an Anderson impurity attached to left and right electron reservoirs. Detailed predictions are made for the linear conductance and the spin-resolved conductance as a function of gate voltage, temperature and magnetic field strength. A strongly coupled quantum dot in a magnetic field acts as a spin filter which can be tuned by varying the gate voltage. The largest spin-filtering effect is found in the range of gate voltages corresponding to the mixed valence regime of the Anderson impurity model.

引用

页数：4

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