Journal
COMMUNICATIONS PHYSICS
Volume 3, Issue 1, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s42005-020-0290-x
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Funding
- Engineering and Physical Sciences Research Council [EP/M012700/1, EP/N033906/1]
- European Union's Horizon 2020 research and innovation programme Graphene Flagship Core 2 [785219]
- Defence Science and Technology Laboratory (Dstl)
- University of Nottingham
- National Academy of Sciences of Ukraine
- Leverhulme Trust [RF-2017-224]
- Royal Society [IE160395]
- Russian Science Foundation [17-12-01393]
- Chinese Academy of Sciences (CAS)
- Russian Science Foundation [20-12-18028] Funding Source: Russian Science Foundation
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Two-dimensional (2D) van der Waals (vdW) crystals have attracted considerable interest for digital electronics beyond Si-based complementary metal oxide semiconductor technologies. Despite the transformative success of Si-based devices, there are limits to their miniaturization and functionalities. Here we realize a resonant tunnelling transistor (RTT) based on a 2D InSe layer sandwiched between two multilayered graphene (MLG) electrodes. In the RTT the energy of the quantum-confined 2D subbands of InSe can be tuned by the thickness of the InSe layer. By applying a voltage across the two MLG electrodes, which serve as the source and drain electrodes to the InSe, the chemical potential in the source can be tuned in and out of resonance with a given 2D subband, leading to multiple regions of negative differential conductance that can be additionally tuned by electrostatic gating. This work demonstrates the potential of InSe and InSe-based RTTs for applications in quantum electronics. Limits on the functionality and miniaturization of Si-based devices present barriers towards integration into quantum electronics. The authors present an alternative, resonant tunnelling transistor based on a two-dimensional layered heterostructure, exhibiting multiple regions of negative differential conductance.
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