Atomic threshold-switching enabled MoS2 transistors towards ultralow-power electronics

Qilin Hua, Guoyun Gao, Chunsheng Jiang, Jinran Yu, Junlu Sun, Taiping Zhang, Bin Gao (), Weijun Cheng, Renrong Liang, He Qian, Weiguo Hu, Qijun Sun (), Zhong Lin Wang () and Huaqiang Wu ()
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Qilin Hua: Tsinghua University
Guoyun Gao: Chinese Academy of Sciences
Chunsheng Jiang: Tsinghua University
Jinran Yu: Chinese Academy of Sciences
Junlu Sun: Chinese Academy of Sciences
Taiping Zhang: Tsinghua University
Bin Gao: Tsinghua University
Weijun Cheng: Tsinghua University
Renrong Liang: Tsinghua University
He Qian: Tsinghua University
Weiguo Hu: Chinese Academy of Sciences
Qijun Sun: Chinese Academy of Sciences
Zhong Lin Wang: Chinese Academy of Sciences
Huaqiang Wu: Tsinghua University

Nature Communications, 2020, vol. 11, issue 1, 1-10

Abstract: Abstract Power dissipation is a fundamental issue for future chip-based electronics. As promising channel materials, two-dimensional semiconductors show excellent capabilities of scaling dimensions and reducing off-state currents. However, field-effect transistors based on two-dimensional materials are still confronted with the fundamental thermionic limitation of the subthreshold swing of 60 mV decade−1 at room temperature. Here, we present an atomic threshold-switching field-effect transistor constructed by integrating a metal filamentary threshold switch with a two-dimensional MoS2 channel, and obtain abrupt steepness in the turn-on characteristics and 4.5 mV decade−1 subthreshold swing (over five decades). This is achieved by using the negative differential resistance effect from the threshold switch to induce an internal voltage amplification across the MoS2 channel. Notably, in such devices, the simultaneous achievement of efficient electrostatics, very small sub-thermionic subthreshold swings, and ultralow leakage currents, would be highly desirable for next-generation energy-efficient integrated circuits and ultralow-power applications.

Date: 2020
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DOI: 10.1038/s41467-020-20051-0

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