Remote Mesoscopic Signatures of Induced Magnetic Texture in Graphene
Remote Mesoscopic Signatures of Induced Magnetic Texture in Graphene
复制标题
石墨烯中感应磁织构的远程介观特征
DOI：
10.1103/physrevlett.126.086802
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发表时间：
2021
影响因子：
8.6
通讯作者：
Dixit, R.
中科院分区：
文献类型：
--
作者：
Arabchigavkani, N.;Somphonsane, R.;Ramamoorthy, H.;He, G.;Nathawat, J.;Yin, S.;Barut, B.;He, K.;Randle, M. D.;Dixit, R.
介观电导波动是小导体中相位相干输运的普遍特征，表现出与系统细节无关的普遍特征。然而，在这封信中，我们证明了这种普遍性的明显崩溃，这是由于运输中本地和远程现象的相互作用。我们的实验是在一个基于石墨烯的相互作用检测几何结构中进行的，其中通过用微磁体覆盖石墨烯层的一部分来在石墨烯层中诱导人工磁性纹理。当探测离该区域一定距离处的传导时，远程因素的强烈影响通过巨电导波动的出现而表现出来，其幅度远大于。这种对介观物理学基本原理之一的违反，戏剧性地展示了相位相干导体中的远程签名如何压倒局部考虑。
Mesoscopic conductance fluctuations are a ubiquitous signature of phase-coherent transport in small conductors, exhibiting universal character independent of system details. In this Letter, 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-basedinteraction-detectiongeometry, 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. 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.