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NDR Behavior of a Phosphorous-Doped Double-Gate MoS2 Armchair Nanoribbon Field Effect Transistor

  • Durgesh Laxman Tiwari
  • K. SivasankaranEmail author
Article
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Abstract

This paper presents the negative differential resistance (NDR) behavior of an MoS2 armchair nanoribbon double-gate field effect transistor. The large peak-to-valley current ratio (PVCR) of 2.58 × 102 with a peak current value of − 0.8 μA is achieved with the presented device configuration. A 5-nm channel length device was considered for the study and an extended Hückel model with nonequilibrium Green’s function method is used for the simulation. A phosphorus atom is used as a substitutional dopant at the sulfur site of the MoS2 field effect transistor near the source and drain regions. The PVCR of the device can be controlled by applying a gate voltage. The achieved subthreshold slope of the device is 88 mV/decade with Ion/Ioff value of 1011 at 300 K. The other parameters such as peak current and NDR voltage window are analyzed. The proposed device configuration shows the potentiality of MoS2 armchair nanoribbon material for future small length scale electronic device applications.

Keywords

Negative differential resistance (NDR) non-equilibrium Green’s function method (NEGF) peak to valley current ratio (PVCR) local density of state (LDOS) 

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Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  1. 1.Department of Micro and Nanoelectronics, School of Electronics EngineeringVellore Institute of TechnologyVelloreIndia

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