论文标题
石墨烯中诱导磁纹理的远程介观特征
Remote Mesoscopic Signatures of Induced Magnetic Texture in Graphene
论文作者
论文摘要
介质电导波动是小导体中相位交通运输的无处不在的特征，其普遍特征与系统细节无关。但是，在这项工作中，由于当地和远程现象在运输中的相互作用，我们证明了这种普遍性的明显崩溃。我们的实验是在基于石墨烯的相互作用检测几何形状中进行的，其中通过用Micromagnet覆盖一部分，在石墨烯层中诱导人造磁纹理。当探测距该区域一定距离的传导时，远程因素的强大影响通过巨大电导波动的出现表现出来，幅度大于$ e^2/h $。这种违反介质物理学的基本原则之一极大地证明了如何因相连的导体中的远程签名而淹没本地考虑。
Mesoscopic conductance fluctuations are a ubiquitous signature of phase-coherent transport in small conductors, exhibiting universal character independent of system details. In this work, however, we demonstrate a pronounced breakdown of this universality, due to the interplay of local and remote phenomena in transport. Our experiments are performed in a graphene-based interaction-detection geometry, in which an artificial magnetic texture is induced in the graphene layer by covering a portion of it with a micromagnet. When probing conduction at some distance from this region, the strong influence of remote factors is manifested through the appearance of giant conductance fluctuations, with amplitude much larger than $e^2/h$. This violation of one of the fundamental tenets of mesoscopic physics dramatically demonstrates how local considerations can be overwhelmed by remote signatures in phase-coherent conductors
