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arXiv 2206.13239cond-mat.mes-hallphysics.app-ph
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GFET Lab:石墨烯场效应晶体管TCAD工具

GFET Lab: A Graphene Field-Effect Transistor TCAD Tool

Nathaniel J. Tye, Abdul Wadood Tadbier, Stephan Hofmann, Phillip Stanley-Marbell

摘要:

石墨烯场效应晶体管(GFET)是一种实验性器件,越来越多地用于商业和研究应用。模拟和建模是促进这一转变的一个重要阶段,但大多数GFET建模依赖于用户实现。为此,我们提出了GFET实验室,一个用户友好的,开源的软件工具,用于模拟GFET。我们首先提供了一个概述的方法,器件建模和GFET紧凑型模型和局限性的简要调查。从这次调查中,我们确定了一个合适的电路设计预测模型的三个关键标准:它必须是一个紧凑的模型;它必须是SPICE兼容的;它必须有一个最小数量的拟合参数。我们选择了希门尼斯的漏电流模型,因为它最符合这些标准,我们引入了一些修改,以提高预测性能,即占饱和速度和n型和p型载流子迁移率的不对称性。然后,我们通过比较在我们的工具中模拟的GFET与实验获得的具有相同材料和几何形状的GFET特性来验证模型,并发现GFET实验室和实验之间的良好一致性。我们证明了出口SPICE模型用于更高层次的电路模拟和比较SPICE模拟GFET对GFET实验室模拟GFET的能力,再次表现出良好的一致性。最后,我们提供了GFET Lab的简短教程,以演示并鼓励将其用作社区开发的软件,同时具有研究和教育应用。

英文摘要:

Graphene field-effect transistors (GFETs) are experimental devices which are increasingly seeing commercial and research applications. Simulation and modelling forms an important stage in facilitating this transition, however the majority of GFET modelling relies on user implementation. To this end, we present GFET Lab, a user-friendly, open-source software tool for simulating GFETs. We first provide an overview of approaches to device modelling and a brief survey of GFET compact models and limitations. From this survey, we identify three key criteria for a suitable predictive model for circuit design: it must be a compact model; it must be SPICE-compatible; it must have a minimal number of fitting parameters. We selected Jimenez's drain-current model as it best matched these criteria, and we introduce some modifications to improve the predictive properties, namely accounting for saturation velocity and the asymmetry in n- and p-type carrier mobilities. We then validate the model by comparing GFETs simulated in our tool against experimentally-obtained GFET characteristics with the same materials and geometries and find good agreement between GFET Lab and experiment. We demonstrate the ability to export SPICE models for use in higher level circuit simulations and compare SPICE simulations of GFETs against GFETs simulated in GFET Lab, again showing good agreement. Lastly, we provide a brief tutorial of GFET Lab to demonstrate and encourage its use as a community-developed piece of software with both research and educational applications.

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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