通过路径积分的迭代求和揭示的通过相互作用量子点自旋阀的共振输运中的相互作用-感应电流不对称性
Interaction-induced current asymmetries in resonant transport through interacting quantum-dot spin valves revealed by iterative summation of path integrals
摘要：
在外加磁场作用下，电子在两个铁磁体和一个量子点之间的共振隧穿揭示了在线性和非线性偏置状态下强烈的栅极依赖性。这种栅极依赖性源于库仑相互作用和量子点与引线之间的自旋相关杂化之间的相互作用。考虑到库仑相互作用强度的相同数量级的外部磁场和杂交强度，我们采用了数值精确迭代求和的路径积分（ISPI）。
英文摘要：
Resonant tunneling of electrons between two ferromagnets and a quantum dot in the presence of an externally applied magnetic field reveals a strong gate dependence in the linear and nonlinear bias regime. This gate dependence originates from the interplay between Coulomb interactions and spin-dependent hybridization between the quantum dot and the leads. To take into account Coulomb interaction strengths of the same order of magnitude as the external magnetic field and the hybridization strength we adopt the numerically exact iterative summation of path integrals (ISPI).
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