论文标题
磁掺杂的量子线中受保护的螺旋传输：超出一维范式
Protected helical transport in magnetically doped quantum wires: Beyond the one-dimensional paradigm
论文作者
论文摘要
通过磁性原子功能化的一维（1D）量子线可以容纳弹道螺旋传输。螺旋性可保护运输免受材料缺陷的不良影响，并使磁掺杂的线成为纳米电子和旋转三位型的非常有希望的元素。但是，纯粹的1D导体在实验上非常具有挑战性，并且并不总是可行的。在本文中，我们表明，即使在准1D线中，受保护的螺旋传输也可以存在。我们将磁性掺杂的金属丝建模为两个耦合的密度1D近旋链。每个链都由巡回电子与局部量子磁矩 - 临界杂质相互作用。我们已经分析了弱，中间和强链链耦合的机制，并发现了上述保护运输的起源所必需的条件。我们的结果可能为在磁性掺杂的电线中对螺旋状态的实验实现铺平了道路。
One-dimensional (1D) quantum wires, which are functionalized by magnetic ad-atoms, can host ballistic helical transport. Helicity protects transport from an undesirable influence of material imperfections, and it makes the magnetically doped wire a very promising element for nanoelectronics and spintronics. However, fabricating purely 1D conductors is experimentally very challenging and not always feasible. In this paper, we show that the protected helical transport can exist even in quasi-1D wires. We model the quasi-1D magnetically doped wire as two coupled dense 1D Kondo chains. Each chain consists of itinerant electrons interacting with localized quantum magnetic moments -- Kondo impurities. We have analyzed the regimes of weak-, intermediate-, and strong inter-chain coupling, and we found conditions necessary for the origin of the aforementioned protected transport. Our results may pave the way for experimental realizations of helical states in magnetically doped wires.
