Spin-dependent transport through an interacting quantum dot.
Spin-dependent transport through an interacting quantum dot.
复制标题
DOI：
10.1103/physrevlett.89.286803
复制
发表时间：
2002-10
影响因子：
8.6
通讯作者：
Ping Zhang;Q. Xue;Yupeng Wang;Xin-cheng Xie
中科院分区：
文献类型：
--
作者：
Ping Zhang;Q. Xue;Yupeng Wang;Xin-cheng Xie
我们研究了自旋通过耦合到磁电极的量子点的非平衡输运。得到了自旋相关的电流公式，并应用于讨论相互作用区的线性电导和磁电阻。我们表明，近藤共振和相关诱导的自旋分裂的点能级可以系统地控制由内部磁化的电极。因此，当电极处于平行磁配置时，线性电导的特征在于两个自旋分辨峰。此外，自旋翻转过程的存在下，在点分裂近藤共振成三个峰。
We study the nonequilibrium spin transport through a quantum dot coupled to the magnetic electrodes. A formula for the spin-dependent current is obtained and is applied to discuss the linear conductance and magnetoresistance in the interacting regime. We show that the Kondo resonance and the correlation-induced spin splitting of the dot levels may be systematically controlled by internal magnetization in the electrodes. As a result, when the electrodes are in parallel magnetic configuration, the linear conductance is characterized by two spin-resolved peaks. Furthermore, the presence of the spin-flip process in the dot splits the Kondo resonance into three peaks.