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Dielectric screening in atomically thin boron nitride nanosheets

Li, Lu Hua, Santos, Elton J., Xing, Tan, Cappelluti, Emmanuele, Roldán, Rafael, Chen, Ying, Watanabe, Kenji and Taniguchi, Takashi 2014, Dielectric screening in atomically thin boron nitride nanosheets, Nano letters, vol. 15, no. 1, pp. 218-223, doi: 10.1021/nl503411a.

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Title Dielectric screening in atomically thin boron nitride nanosheets
Author(s) Li, Lu Hua
Santos, Elton J.
Xing, Tan
Cappelluti, Emmanuele
Roldán, Rafael
Chen, YingORCID iD for Chen, Ying orcid.org/0000-0002-7322-2224
Watanabe, Kenji
Taniguchi, Takashi
Journal name Nano letters
Volume number 15
Issue number 1
Start page 218
End page 223
Publisher American Chemical Society
Place of publication Washinton, D. C.
Publication date 2014-01
ISSN 1530-6992
Keyword(s) boron nitride nanosheets
electric field screening
electric force microscopy (EFM)
first-principles calculations
nonlinear Thomas−Fermi theory
nonlinear Thomas-Fermi theory
Summary Two-dimensional (2D) hexagonal boron nitride (BN) nanosheets are excellent dielectric substrate for graphene, molybdenum disulfide, and many other 2D nanomaterial-based electronic and photonic devices. To optimize the performance of these 2D devices, it is essential to understand the dielectric screening properties of BN nanosheets as a function of the thickness. Here, electric force microscopy along with theoretical calculations based on both state-of-the-art first-principles calculations with van der Waals interactions under consideration, and nonlinear Thomas-Fermi theory models are used to investigate the dielectric screening in high-quality BN nanosheets of different thicknesses. It is found that atomically thin BN nanosheets are less effective in electric field screening, but the screening capability of BN shows a relatively weak dependence on the layer thickness.
Language eng
DOI 10.1021/nl503411a
Field of Research 100708 Nanomaterials
100705 Nanoelectronics
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2015, American Chemical Society
Persistent URL http://hdl.handle.net/10536/DRO/DU:30069714

Document type: Journal Article
Collection: Institute for Frontier Materials
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