Coulomb blockade behavior in nanostructured graphene with direct contacts
Coulomb blockade behavior in nanostructured graphene with direct contacts
复制标题
直接接触纳米结构石墨烯的库仑封锁行为
DOI：
10.1166/mex.2013.1105
复制
发表时间：
2013
影响因子：
0.7
通讯作者：
and D. Tsuya
中科院分区：
文献类型：
--
作者：
S. Moriyama;Y. Morita;E. Watanabe;and D. Tsuya
本文提出了一种新的基于石墨烯的量子点器件结构，在这种结构中，纳米结构的石墨烯孤岛被完全隔离，金属接触直接沉积在其上而不受限制。这种构型预计不会受到收缩结构波动引起的干扰，并允许与纳米结构的二维电子气直接接触。对器件结构进行了输运光谱分析，揭示了器件在低温下的库仑阻塞行为。在这些器件中观察到了不规则的库仑钻石，这是一个多量子点系统形成的迹象。
This paper proposes a new graphene-based quantum-dot device structure, in which nanostructured graphene islands are perfectly isolated and metallic contacts are directly deposited onto them without constrictions. Such a configuration is expected to be free from disturbances resulting from the structural fluctuation of constrictions, and allows for direct contact with a nanostructured two-dimensional electron gas. Transport spectroscopy analysis of this device structure was performed, and its Coulomb blockade behavior at low temperatures was revealed. Irregular Coulomb diamonds are observed in these devices, which is an indication of the formation of a multiple-quantum-dot system.