Atomically-thin 2D semiconducting materials integrated into van der Waals heterostructures have enabled architectures that hold great promise for next generation nanoelectronics. However, challenges still remain to enable their full acceptance as compliant materials for integration in logic devices. Two key-components to master are the barriers at metal/semiconductor interfaces and the mobility of the semiconducting channel, which endow the building-blocks of pn diode and field effect transistor. Here, we have devised a reverted stacking technique to intercalate a wrinkle-free h-BN tunnel layer between MoS2 channel and contacting electrodes. Vertical tunnelling of electrons therefore makes it possible to suppress the Schottky barriers and Fermi level pinning, leading to homogeneous gate-control of the channel chemical potential across the bandgap edges. The observed unprecedented features of ambipolar pn to np diode, which can be reversibly gate tuned, paves the way for future logic applications and high performance switches based on atomically thin semiconducting channel.
@article{arxiv.1704.06668,
title = {Gate-controlled reversible rectifying behaviour in tunnel contacted atomically-thin MoS$_{2}$ transistor},
author = {Xiaoxi Li and Zhiqiang Fan and Peizhi Liu and Maolin Chen and Xin Liu and Chuankun Jia and Dongming Sun and Xiangwei Jiang and Zheng Vitto Han and Vincent Bouchiat and Junjie Guo and Jianhao Chen and Zhidong Zhang},
journal= {arXiv preprint arXiv:1704.06668},
year = {2018}
}