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  4. A Steep-Slope Transistor Combining Phase-Change and Band-to-Band-Tunneling to Achieve a sub-Unity Body Factor
 
research article

A Steep-Slope Transistor Combining Phase-Change and Band-to-Band-Tunneling to Achieve a sub-Unity Body Factor

Vitale, Wolfgang A.
•
Casu, Emanuele A.
•
Biswas, Arnab  
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2017
Scientific Reports

Steep-slope transistors allow to scale down the supply voltage and the energy per computed bit of information as compared to conventional field-effect transistors (FETs), due to their sub-60 mV/decade subthreshold swing at room temperature. Currently pursued approaches to achieve such a subthermionic subthreshold swing consist in alternative carrier injection mechanisms, like quantum mechanical band-to-band tunneling (BTBT) in Tunnel FETs or abrupt phase-change in metal-insulator transition (MIT) devices. The strengths of the BTBT and MIT have been combined in a hybrid device architecture called phase-change tunnel FET (PC-TFET), in which the abrupt MIT in vanadium dioxide (VO2) lowers the subthreshold swing of strained-silicon nanowire TFETs. In this work, we demonstrate that the principle underlying the low swing in the PC-TFET relates to a sub-unity body factor achieved by an internal differential gate voltage amplification. We study the effect of temperature on the switching ratio and the swing of the PC-TFET, reporting values as low as 4.0 mV/decade at 25 °C, 7.8 mV/decade at 45 °C. We discuss how the unique characteristics of the PC-TFET open new perspectives, beyond FETs and other steep-slope transistors, for low power electronics, analog circuits and neuromorphic computing.

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Type
research article
DOI
10.1038/s41598-017-00359-6
Web of Science ID

WOS:000397096800011

Author(s)
Vitale, Wolfgang A.
Casu, Emanuele A.
Biswas, Arnab  
Rosca, Teodor  
Alper, Cem  
Krammer, Anna  
Luong, Gia V.
Zhao, Qing-T.
Mantl, Siegfried
Schüler, Andreas
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Date Issued

2017

Publisher

Nature Research

Published in
Scientific Reports
Volume

7

Issue

1

Start page

355

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

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NANOLAB  
LESO-PB  
Available on Infoscience
March 24, 2017
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/135768
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