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Asymmetric electric field screening in van der Waals heterostructures

Li, Lu hua, Tian, Tian, Cai, Qiran, Shih, Chih-Jen and Santos, Elton J. G. 2018, Asymmetric electric field screening in van der Waals heterostructures, Nature communications, vol. 9, pp. 1-11, doi: 10.1038/s41467-018-03592-3.

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Title Asymmetric electric field screening in van der Waals heterostructures
Author(s) Li, Lu huaORCID iD for Li, Lu hua orcid.org/0000-0003-2435-5220
Tian, Tian
Cai, Qiran
Shih, Chih-Jen
Santos, Elton J. G.
Journal name Nature communications
Volume number 9
Article ID 1271
Start page 1
End page 11
Total pages 11
Publisher Springer Nature
Place of publication London, England
Publication date 2018-03-28
ISSN 2041-1723
Keyword(s) Science & Technology
Multidisciplinary Sciences
Science & Technology - Other Topics
AUGMENTED-WAVE METHOD
BORON-NITRIDE
2-DIMENSIONAL MATERIALS
DIELECTRIC-CONSTANT
LAYER MOS2
GRAPHENE
SURFACE
FILMS
PSEUDOPOTENTIALS
ELECTRONICS
Summary A long-standing challenge facing the combination of two-dimensional crystals into heterojunction is the unknown effect of mixing layer of different electronic properties (semiconductors, metals, insulators) on the screening features of the fabricated device platforms including their functionality. Here we use a compelling set of theoretical and experimental techniques to elucidate the intrinsic dielectric screening properties of heterostructures formed by MoS2 and graphene layers. We experimentally observed an asymmetric field screening effect relative to the polarization of the applied gate bias into the surface. Surprisingly, such behavior allows selection of the electronic states that screen external fields, and it can be enhanced with increasing of the number of layers of the semiconducting MoS2 rather than the semi-metal. This work not only provides unique insights on the screening properties of a vast amount of heterojunction fabricated so far, but also uncovers the great potential of controlling a fundamental property for device applications.
Language eng
DOI 10.1038/s41467-018-03592-3
Field of Research MD Multidisciplinary
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2018, The Authors
Free to Read? Yes
Use Rights Creative Commons Attribution licence
Persistent URL http://hdl.handle.net/10536/DRO/DU:30108647

Document type: Journal Article
Collections: Institute for Frontier Materials
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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.