Genomics of carbon atomic chains
Genomics of carbon atomic chains
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DOI：
10.1016/j.carbon.2021.07.079
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发表时间：
2021-08-09
期刊：
影响因子：
10.9
通讯作者：
Sadeghi, Hatef
中科院分区：
文献类型：
--
作者：
Daaoub, Abdalghani;Lambert, Colin J.;Sadeghi, Hatef
为了实现亚纳米石墨烯结的技术潜力，有必要了解它们的电子和自旋电子学特性是如何由桥接它们间隙的碳链控制的。最近的实验努力，形成原位全碳结使用石墨烯电极连接到碳链的动机，在这里，我们系统地研究了各种各样的这样的结构。我们发现，虽然广泛的传输特性是可能的，路口可以分为少数类别，根据其定性的传输特性。例如，我们发现由偶数碳原子链桥接的结往往比由奇数碳原子链桥接的结具有更低的电导。我们还发现，铁磁对齐的电极表面边缘的结具有比反铁磁对齐的更高的传输，因为铁磁对齐倾向于增加自旋载流子之一的传输。我们还研究了终端环的效果，电极终端的边缘和边缘的饱和度与氢对全碳结的输运性质的影响。就像基因组学一样，我们的研究结果提供了一套完整的信息，以构建具有自旋电子应用所需特性的碳链形成的结。(C)2021爱思唯尔有限公司保留所有权利。
To realise the technological potential of subnanometer graphene junctions, there is a need to understand how their electronic and spintronic properties are controlled by the carbon chains bridging their gaps. Motivated by the recent experimental efforts to form in-situ all-carbon junctions using graphene electrodes connected to carbon chains, here we systematically study a wide variety of such structures. We find that although a wide range of transport properties are possible, the junctions can be divided into a small number of categories, according to their qualitative transport properties. For example, we find that junctions bridged by even-numbered chains of carbon atoms tend to have a lower conductance than those bridged by odd-numbered atomic chains. We also find that junctions with ferromagnetically aligned electrode surface edges have a higher transmission than anti-ferromagnetically aligned ones, because ferromagnetic alignment tends to increase the transmission of one of the spin carriers. We also examine the effect of terminal rings, electrode terminal edges and the effect of saturation of edges with hydrogen on transport properties of all-carbon junctions. Just like genomics, our findings provide a complete set of information to construct junctions formed by carbon chains with desired properties for spintronic applications. (C) 2021 Elsevier Ltd. All rights reserved.