.png){kind=icon}
返回
Room-temperature current blockade in atomically defined single-cluster junctions
.png){kind=icon}
PRE
AI
DOI：10.1038/NNANO.2017.156.png)
.png){kind=icon}
原文求助.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
Fabricating nanoscopic devices capable of manipulating and processing single units of charge is an essential step towards creating functional devices where quantum effects dominate transport characteristics. The archetypal single-electron transistor comprises a small conducting or semiconducting island separated from two metallic reservoirs by insulating barriers(1-5). By enabling the transfer of a well-defined number of charge carriers between the island and the reservoirs, such a device may enable discrete single-electron operations(6-9). Here, we describe a single-molecule junction comprising a redox-active, atomically precise cobalt chalcogenide cluster wired between two nanoscopic electrodes(10,11). We observe current blockade at room temperature in thousands of single-cluster junctions. Below a threshold voltage, charge transfer across the junction is suppressed. The device is turned on when the temporary occupation of the core states by a transiting carrier is energetically enabled, resulting in a sequential tunnelling process and an increase in current by a factor of similar to 600. We perform in situ and ex situ cyclic voltammetry as well as density functional theory calculations to unveil a two-step process mediated by an orbital localized on the core of the cluster in which charge carriers reside before tunnelling to the collector reservoir. As the bias window of the junction is opened wide enough to include one of the cluster frontier orbitals, the current blockade is lifted and charge carriers can tunnel sequentially across the junction.
Keyword:
MOLECULE TRANSISTORS
ELECTRON TRANSISTOR
QUANTUM DOTS
CONDUCTANCE
TRANSITION
TRANSPORT
STM
AI总结
对已上传原文的论文进行重点信息的提取，主要内容包括：简要概述、研究摘要、背景介绍、关键亮点、图文解析、展望与总结。
期刊
IF:
34.9
论文数:
4.8K
被引数:
8.1W
机构
引用论文
Field-induced conductance switching by charge-state alternation in organometallic single-molecule junctions.png)
NATURE NANOTECHNOLOGY
NATURE NANOTECHNOLOGYIF34.9
PREAI
分享收藏
分享收藏
分享收藏
查看更多内容