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arXiv 0908.3638cond-mat.mes-hallcond-mat.supr-con
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单个C60晶体管的超导性

Superconductivity in a single C60 transistor

C. B. Winkelmann, N. Roch, W. Wernsdorfer, V. Bouchiat, F. Balestro

摘要:

单分子晶体管(SMT)作为可能的量子信息处理器件目前吸引了巨大的关注。然而,对这些前景的固有限制与少量量化电导沟道的存在相关联,每个沟道具有至多$R_{K}/2=h/2e^{2}$ =12.9 k $Ω$的高接入电阻。当接触的引线变得超导时,这些相关性可以通过邻近效应扩展到整个系统。这不仅提升了正常状态接触的电阻限制,而且进一步为探测通过单个分子的电子输运铺平了新的道路。在这项工作中,我们展示了实现超导SMT涉及一个单一的C60富勒烯分子。在过去的几年中,已经看到了门控约瑟夫森超电流在低维碳结构家族中诱导,例如二维石墨烯的薄片和一维碳纳米管的部分。目前的研究涉及一个完整的零维富勒烯完成图片。

英文摘要:

Single molecule transistors (SMTs) are currently attracting enormous attention as possible quantum information processing devices. An intrinsic limitation to the prospects of these however is associated to the presence of a small number of quantized conductance channels, each channel having a high access resistance of at best $R_{K}/2=h/2e^{2}$=12.9 k$Ω$. When the contacting leads become superconducting, these correlations can extend throughout the whole system by the proximity effect. This not only lifts the resistive limitation of normal state contacts, but further paves a new way to probe electron transport through a single molecule. In this work, we demonstrate the realization of superconducting SMTs involving a single C60 fullerene molecule. The last few years have seen gate-controlled Josephson supercurrents induced in the family of low dimensional carbon structures such as flakes of two-dimensional graphene and portions of one-dimensional carbon nanotubes. The present study involving a full zero-dimensionnal fullerene completes the picture.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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