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Dependences of the Electrical Properties on the Diameter and the Doping Concentration of the Si Nanowire Field Effect Transistors with a Schottky Metal-Semiconductor Contact

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Abstract:

A compact model of the current–voltage (IV) characteristics for the Si nanowire field effect transistor (FET) taking into account dependence of the analytical electrical properties on the diameter and the concentration of the Si nanowire of the FETs with a Schottky metal-semiconductor contact has been proposed. IV characteristics of the nanowire FETs were analytically calculated by using a quantum drift-diffusion current transport model taking into account an equivalent circuit together with the quantum effect of the Si nanowires and a Schottky model at Schottky barriers. The material parameters dependent on different diameters and concentrations of the Si nanowire were numerically estimated from the physical properties of the Si nanowire. The threshold voltage, the mobility, and the doping density of the Si nanowire and the Schottky barrier height at a metal-Si nanowire heterointerface in the nanowire FET were estimated by using the theoretical model.

Keywords: ANALYTICAL CIRCUIT MODEL; DRIFT-DIFFUSION TRANSPORT; NANOWIRE; SCHOTTKY DIODE

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2010.2273

Publication date: May 1, 2010

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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