非均匀磁化下相互作用量子点的输运性质
Transport Properties of an Interacting Quantum Dot with a Non-Uniform Magnetization
摘要：
研究了磁化场的非均匀性对量子点中相互作用电子行为的影响。特别是，我们研究了当点与两个铁磁引线弱耦合时的磁输运性质。我们在非微扰的情况下考虑了量子点中的相互作用。对于在费米波长尺度上缓慢变化的磁化强度，非均匀性效应由可以微扰处理的规范势来描述。
英文摘要：
We study the influence of the non-homogeneity of a magnetization field on the behaviour of interacting electrons in a quantum dot. In particular we investigate the magnetotransport properties when the dot is weakly coupled to two ferromagnetic leads. We take into account the interactions in the quantum dot non-perturbatively. For a magnetization which varies slowly on the scale of the Fermi wave length, the non-homogeneity effect is described by a gauge potential that can be treated perturbatively.
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