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arXiv 1804.10883cond-mat.mes-hall
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石墨烯中GHz频率下的接触门控

Contact gating at GHz frequency in graphene

Q. Wilmart, A. Inhofer, M. Boukhicha, W. Yang, M. Rosticher, P. Morfin, N. Garroum, G. Fève, J. -M. Berroir, B. Plaçais

摘要:

石墨烯晶体管的范例是基于借助于局部沟道栅极对沟道载流子密度的栅极调制。这种标准架构受到沟道长度的缩放限制以及由于阻碍器件性能的接入和接触电阻而导致的进一步限制。我们提出了一种新的设计,克服这些问题,通过实施额外的本地门下面的接触区域,允许完全控制的克莱因势垒发生在接触边缘。特别是,我们的工作演示了GHz的操作由独立的接触门驱动的晶体管。我们基准的标准通道和新的接触门控和报告,为以后的动态的费米能级在最先进的状态。我们的发现可能会发现在电子学和光电子学中的应用,每当有需要独立控制的费米能级和静电势的电子源或摆脱繁琐的本地通道门。

英文摘要:

The paradigm of graphene transistors is based on the gate modulation of the channel carrier density by means of a local channel gate. This standard architecture is subject to the scaling limit of the channel length and further restrictions due to access and contact resistances impeding the device performance. We propose a novel design, overcoming these issues by implementing additional local gates underneath the contact region which allow a full control of the Klein barrier taking place at the contact edge. In particular, our work demonstrates the GHz operation of transistors driven by independent contact gates. We benchmark the standard channel and novel contact gating and report for the later dynamical transconductance levels at the state of the art. Our finding may find applications in electronics and optoelectronics whenever there is need to control independently the Fermi level and the electrostatic potential of electronic sources or to get rid of cumbersome local channel gates.

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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