We investigate the linear and nonlinear transport through a single levelquantum dot connected to two ferromagnetic leads in Kondo regime, using theslave-boson mean field approach for finite on-site Coulomb repulsion. We findthat for antiparallel alignment of the spin orientations in the leads, a singlezero-bias Kondo peak always appears in the voltage-dependent differentialconductance with peak height going down to zero as the polarization grows toP=1. For parallel configuration, with increasing polarization from zero, theKondo peak descends and greatly widens by the appearance of shoulders, andfinally splits into two peaks on both sides of the bias voltage around $P\sim0.7$ until disappears at even larger polarization strength. At any spinorientation angle $\theta$, the linear conductance generally drops with growingpolarization strength. For a given finite polarization, the minimum linearconductance always appears at $\theta=\pi$.
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机译：我们使用在有限的现场库仑斥力的从动玻色子平均场方法，研究了通过连接到近藤制中的两个铁磁引线的单个能级量子点的线性和非线性传输。我们发现，对于引线中自旋方向的反平行对齐，一个零零偏近藤峰总是出现在电压相关的差分电导中，随着极化增长到P = 1，峰高下降到零。对于平行配置，随着极化从零开始增加，近藤峰会下降并由于肩部的出现而大大加宽，并最终在$ P \ sim0.7 $附近的偏置电压的两侧分裂为两个峰，直到极化强度更大时消失。在任何旋转取向角angle \θthe，线性电导通常随着极化强度的增加而下降。对于给定的有限极化，最小线性电导始终出现在$ \ theta = \ pi $。
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