尽管存在微扰，但分段的强相互作用自旋链中的巨整流
Giant rectification in segmented, strongly interacting, spin chains despite the presence of perturbations
摘要：
In Phys. Rev. Lett. 120，200603（2018），一个分段的XXZ自旋链，一半为零各向异性，另一半为大的各向异性，产生了自旋电流整流，这在热力学极限下是完美的。在这里，我们扩展了以前的研究，分段链相互作用的可积以及不可积的一半，甚至考虑的情况下，没有弹道输运可以出现在任何一半。我们证明，也在这种更一般的情况下，有可能获得巨大的整流时，两个相互作用的半链是足够不同的。我们还表明，造成这种效果的机制是出现了一个能隙的激发光谱中的平衡绝缘稳态的两个偏压之一。最后，我们证明，在热力学极限有没有完美的整流时，每两个半链相互作用。
英文摘要：
In Phys. Rev. Lett. 120, 200603 (2018), a segmented XXZ spin chain with zero anisotropy in one half and a large anisotropy on the other half gave rise to a spin current rectification which is perfect in the thermodynamic limit. Here we extend the previous study to segmented chains with interacting integrable as well as non-integrable halves, considering even cases in which no ballistic transport can emerge in either half. We demonstrate that, also in this more general case, it is possible to obtain giant rectification when the two interacting half chains are sufficiently different. We also show that the mechanism causing this effect is the emergence of an energy gap in the excitation spectrum of the out-of-equilibrium insulating steady state in one of the two biases. Finally we demonstrate that in the thermodynamic limit there is no perfect rectification when each of the two half chains is interacting.
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