Transport Properties of a MoS2/WSe2 Heterojunction Transistor and Its Potential for Application

Nano Letters
Amirhasan NourbakhshTomas Palacios

Abstract

This paper studies band-to-band tunneling in the transverse and lateral directions of van der Waals MoS2/WSe2 heterojunctions. We observe room-temperature negative differential resistance (NDR) in a heterojunction diode comprised of few-layer WSe2 stacked on multilayer MoS2. The presence of NDR is attributed to the lateral band-to-band tunneling at the edge of the MoS2/WSe2 heterojunction. The backward tunneling diode shows an average conductance slope of 75 mV/dec with a high curvature coefficient of 62 V(-1). Associated with the tunnel-diode characteristics, a positive-to-negative transconductance in the MoS2/WSe2 heterojunction transistors is observed. The transition is induced by strong interlayer coupling between the films, which results in charge density and energy-band modulation. The sign change in transconductance is particularly useful for multivalued logic (MVL) circuits, and we therefore propose and demonstrate for the first time an MVL-inverter that shows three levels of logic using one pair of p-type transistors.

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Citations

Jun 4, 2016·ACS Applied Materials & Interfaces·Yongtao LiJingbo Li
Mar 11, 2017·Scientific Reports·Veerendra Dhyani, Samaresh Das
Mar 21, 2017·Nanoscale·Wanshun XiaZhiming Wang
Jun 3, 2016·Physical Chemistry Chemical Physics : PCCP·Kai-Xuan ChenShu-Shen Lyu
Mar 13, 2018·Chemical Society Reviews·Peng ChenXiangfeng Duan
Feb 22, 2018·Annual Review of Physical Chemistry·Vinod K Sangwan, Mark C Hersam
May 24, 2018·Nanotechnology·Ming LiXiao Cheng Zeng
Jul 10, 2019·Physical Chemistry Chemical Physics : PCCP·Huasong QinYong-Wei Zhang
Jul 18, 2019·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Yanbo ZiYu Jia
Sep 19, 2019·Small·Jing CuanXuebin Yu
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Jul 30, 2020·Nanoscale Horizons : the Home for Rapid Reports of Exceptional Significance in Nanoscience and Nanotechnolgy·Maksim AndreevJin-Hong Park
Mar 1, 2018·Nanoscale Horizons : the Home for Rapid Reports of Exceptional Significance in Nanoscience and Nanotechnolgy·Morasae SamadiAlireza Z Moshfegh
Oct 28, 2017·Journal of Vacuum Science and Technology. B, Nanotechnology & Microelectronics : Materials, Processing, Measurement, & Phenomena : JVST B·Rui Dong, Irma Kuljanishvili
Oct 11, 2017·Nature Nanotechnology·Mingqiang HuangYanqing Wu

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