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International Journal of Nano Dimension
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Sedigh Ziabari, S., Tavakoli Saravani, M. (2017). A novel lightly doped drain and source Carbon nanotube field effect transistor (CNTFET) with negative differential resistance. International Journal of Nano Dimension, 8(2), 107-113. doi: 10.22034/ijnd.2017.24833
Seyed Ali Sedigh Ziabari; Mohammad Javad Tavakoli Saravani. "A novel lightly doped drain and source Carbon nanotube field effect transistor (CNTFET) with negative differential resistance". International Journal of Nano Dimension, 8, 2, 2017, 107-113. doi: 10.22034/ijnd.2017.24833
Sedigh Ziabari, S., Tavakoli Saravani, M. (2017). 'A novel lightly doped drain and source Carbon nanotube field effect transistor (CNTFET) with negative differential resistance', International Journal of Nano Dimension, 8(2), pp. 107-113. doi: 10.22034/ijnd.2017.24833
Sedigh Ziabari, S., Tavakoli Saravani, M. A novel lightly doped drain and source Carbon nanotube field effect transistor (CNTFET) with negative differential resistance. International Journal of Nano Dimension, 2017; 8(2): 107-113. doi: 10.22034/ijnd.2017.24833

A novel lightly doped drain and source Carbon nanotube field effect transistor (CNTFET) with negative differential resistance

Article 2, Volume 8, Issue 2, Spring 2017, Page 107-113  XML PDF (864.75 K)
Document Type: Reasearch Paper
DOI: 10.22034/ijnd.2017.24833
Authors
Seyed Ali Sedigh Ziabari email 1; Mohammad Javad Tavakoli Saravani2
1Department of Electrical Engineering, Rasht Branch, Islamic Azad University, Rasht, Iran
2Department of Electrical Engineering, Mehrastan Institute of Higher Education, Astaneh Ashrafieh, Iran
Abstract
In this paper, we propose and evaluate a novel design of a lightly doped drain and source carbon nanotube field effect transistor (LDDS-CNTFET) with a negative differential resistance (NDR) characteristic, called negative differential resistance LDDS-CNTFET (NDR-LDDS-CNTFET). The device was simulated by using a non equilibrium Green’s function method. To achieve this phenomenon, we have created two quantum wells in the intrinsic channel by using two n-type regions. In the wells that are separated by a thin barrier, two resonance states are generated. On the other hand, the thickness of the barrier between the source and the well is variable depending on the energy level. Accordingly, with increasing gate-source voltage, the number of tunneling electrons and consequently drain-source current are varied. Furthermore, we have presented a structure with two n-type and three p-type regions in the channel that illustrates a larger NDR region. In this structure, the peak and valley of the drain-source current are shifted when compared with the previous structure. Finally, we investigated the effect of doping concentration on the NDR parameter.
Keywords
Carbon Nanotube; Lightly doped drain and source (LDDS); Negative differential resistance; Resonance energy states; Quantum well
Main Subjects
Carbon Nanotubs; Nanochemistry; Nanoelectronic; Nanomaterial; Nanotechnology
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