场相关共振隧穿自旋滤波
Spin-filtering by field dependent resonant tunneling
摘要:
本文从理论上研究了置于外磁场中的自旋单通道相互作用量子线中的输运。对于两个点状杂质嵌入在导线中的情况下,在一个小的电压偏置的自旋极化电流发生在参数空间中的特定点,由一个单一的参数可调。在足够低的温度下,只要电子之间的排斥作用不太强,就可以实现完全的自旋极化。
英文摘要:
We consider theoretically transport in a spinfull one-channel interacting quantum wire placed in an external magnetic field. For the case of two point-like impurities embedded in the wire, under a small voltage bias the spin-polarized current occurs at special points in the parameter space, tunable by a single parameter. At sufficiently low temperatures complete spin-polarization may be achieved, provided repulsive interaction between electrons is not too strong.
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