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Graphene-like metal-on-silicon field-effect transistor

机译:类石墨烯的硅基金属场效应晶体管

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This paper presents a field-effect transistor with a channel consisting of a two-dimensional electron gas located at the interface between an ultrathin metallic film of Ni and a p-type Si(111) substrate. The gate length is L=2μm, its width is W=180μm, and the source-drain separation is 188μm, the role of the gate dielectric being played by the surface states of the ultrathin metal layer. We have demonstrated that the two-dimensional electron gas channel is modulated by the gate voltage. The dependence of the drain current on the drain voltage has no saturation region, similar to a field-effect transistor based on graphene. The drain current is 2mA at a drain voltage of 3V and a gate voltage of 1.07V, while the transconductance is 0.6mS for a drain voltage of 6V and a gate voltage of 1V. However, the transport in this transistor is not ambipolar, as in graphene, but unipolar.
机译:本文提出了一种场效应晶体管,其沟道由二维电子气组成,该沟道位于Ni的超薄金属膜与p型Si(111)衬底之间的界面处。栅极长度为L =2μm,宽度为W =180μm,源极-漏极间距为188μm,栅极电介质的作用由超薄金属层的表面状态发挥。我们已经证明了二维电子气通道是由栅极电压调制的。漏极电流对漏极电压的依赖性没有饱和区,类似于基于石墨烯的场效应晶体管。在3V的漏极电压和1.07V的栅极电压下,漏极电流为2mA,而在6V的漏极电压和1V的栅极电压下,跨导为0.6mS。然而,该晶体管中的传输不是石墨烯中的双极性,而是单极性。

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