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arXiv 1301.0673cond-mat.mes-hall
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SymFET:一种对称石墨烯隧道场效应晶体管

SymFET: A Proposed Symmetric Graphene Tunneling Field Effect Transistor

Pei Zhao, Randall M. Feenstra, Gong Gu, Debdeep Jena

摘要:

本文提出了一种计算对称隧穿场效应晶体管(SymFET)沟道电位和电流-电压特性的解析模型。SymFET中的电流通过从n型石墨烯层到p型石墨烯层的隧穿而流动。当狄拉克点在特定的漏极-源极偏置VDS处对准时,出现大的电流峰值。我们的模型表明,SymFET的电流是非常弱的依赖于温度。谐振电流峰值由化学掺杂和施加的栅极偏压控制。开/关比随着石墨烯相干长度和掺杂而增加。对称谐振峰值是高速模拟应用的良好候选,并且可以实现类似于BiSFET的数字逻辑。我们的分析模型还提供了允许简单的分析功能,如谐振峰的半高宽(FWHM)和非线性电流的高次谐波的好处。SymFET利用了2D石墨烯能带结构的完美对称性,这是传统半导体中不存在的特征。

英文摘要:

In this work, an analytical model to calculate the channel potential and current-voltage characteristics in a Symmetric tunneling Field-Effect-Transistor (SymFET) is presented. The current in a SymFET flows by tunneling from an n-type graphene layer to a p-type graphene layer. A large current peak occurs when the Dirac points are aligned at a particular drain-to- source bias VDS . Our model shows that the current of the SymFET is very weakly dependent on temperature. The resonant current peak is controlled by chemical doping and applied gate bias. The on/off ratio increases with graphene coherence length and doping. The symmetric resonant peak is a good candidate for high-speed analog applications, and can enable digital logic similar to the BiSFET. Our analytical model also offers the benefit of permitting simple analysis of features such as the full-width-at-half-maximum (FWHM) of the resonant peak and higher order harmonics of the nonlinear current. The SymFET takes advantage of the perfect symmetry of the bandstructure of 2D graphene, a feature that is not present in conventional semiconductors.

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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