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arXiv 0812.1694cond-mat.mes-hall
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部分弹道或耗散输运状态下纳米线FET的分析模型

Analytical model of nanowire FETs in a partially ballistic or dissipative transport regime

Paolo Michetti, Giorgio Mugnaini, Giuseppe Iannaccone

摘要:

在纳米晶体管中,由漂移扩散模型描述的完全弹道情况和准平衡情况之间的中间输运状态仍然是一个开放的建模问题。已经提出了问题的分析方法,基于引入后向散射系数,或数值方法,包括在蒙特卡洛解的玻尔兹曼输运方程或在量子输运描述中引入耗散。在本文中,我们提出了一个非常简单的分析模型,无缝地覆盖整个范围内的通用准一维场效应晶体管的传输制度,并将其应用到硅纳米线晶体管。该模型基于将通用晶体管描述为串联的弹道纳米线晶体管的链,或者描述为在势垒区中操作的弹道晶体管和漂移扩散晶体管的系列。作为一个额外的结果,我们发现的流动性和平均自由程之间的关系,有深刻的后果,在纳米器件的运输的理解。

英文摘要:

The intermediate transport regime in nanoscale transistors between the fully ballistic case and the quasi equilibrium case described by the drift-diffusion model is still an open modeling issue. Analytical approaches to the problem have been proposed, based on the introduction of a backscattering coefficient, or numerical approaches consisting in the MonteCarlo solution of the Boltzmann transport equation or in the introduction of dissipation in quantum transport descriptions. In this paper we propose a very simple analytical model to seamlessly cover the whole range of transport regimes in generic quasi-one dimensional field-effect transistors, and apply it to silicon nanowire transistors. The model is based on describing a generic transistor as a chain of ballistic nanowire transistors in series, or as the series of a ballistic transistor and a drift-diffusion transistor operating in the triode region. As an additional result, we find a relation between the mobility and the mean free path, that has deep consequences on the understanding of transport in nanoscale devices.

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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