论文标题
由于负差分电导的相互作用和不均匀的磁场，巨型自旋电流矫正
Giant spin current rectification due to the interplay of negative differential conductance and a non-uniform magnetic field
论文作者
论文摘要
在XXZ链中，当链中的相互作用和耗散驾驶的偏见足够大时，自旋传输可以显着抑制。这种负差分电导的现象是由链边缘处的两个相对极化的铁磁域形成引起的。在这里，我们表明，这种多体效应与不均匀的磁场结合在一起，可以高度控制自旋电流。特别是，通过研究二分法局部磁场的所有可能组合，我们发现磁场指向链的一半并向下方降低的配置可能会导致巨大的自旋流动整流，例如，对于带$ 8 $ $ $ $的系统的系统，最高可达$ 10^8 $。我们的结果表明，清楚的迹象表明，纠正可以随系统大小而增加。
In XXZ chains, spin transport can be significantly suppressed when the interactions in the chain and the bias of the dissipative driving are large enough. This phenomenon of negative differential conductance is caused by the formation of two oppositely polarized ferromagnetic domains at the edges of the chain. Here we show that this many-body effect, combined with a non-uniform magnetic field, can allow a high degree of control of the spin current. In particular, by studying all the possible combinations of a dichotomous local magnetic field, we found that a configuration in which the magnetic field points up for half of the chain and down for the other half, can result in giant spin-current rectification, for example up to $10^8$ for a system with $8$ spins. Our results show clear indications that the rectification can increase with the system size.
