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Strain Engineering on the Electronic and Optical Properties of WSSe Bilayer

Controllable optical properties are important for optoelectronic applications. Based on the unique properties and potential applications of two-dimensional Janus WSSe, we systematically investigate the strain-modulated electronic and optical properties of WSSe bilayer through the first-principle cal...

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Autores principales: Guo, Jian, Ke, Congming, Wu, Yaping, Kang, Junyong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer US 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7198690/
https://www.ncbi.nlm.nih.gov/pubmed/32367196
http://dx.doi.org/10.1186/s11671-020-03330-z
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author Guo, Jian
Ke, Congming
Wu, Yaping
Kang, Junyong
author_facet Guo, Jian
Ke, Congming
Wu, Yaping
Kang, Junyong
author_sort Guo, Jian
collection PubMed
description Controllable optical properties are important for optoelectronic applications. Based on the unique properties and potential applications of two-dimensional Janus WSSe, we systematically investigate the strain-modulated electronic and optical properties of WSSe bilayer through the first-principle calculations. The preferred stacking configurations and chalcogen orders are determined by the binding energies. The bandgap of all the stable structures are found sensitive to the external stress and could be tailored from semiconductor to metallicity under appropriate compressive strains. Atomic orbital projected energy bands reveal a positive correlation between the degeneracy and the structural symmetry, which explains the bandgap evolutions. Dipole transition preference is tuned by the biaxial strain. A controllable transformation between anisotropic and isotropic optical properties is achieved under an around − 6%~− 4% critical strain. The strain controllable electronic and optical properties of the WSSe bilayer may open up an important path for exploring next-generation optoelectronic applications.
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spelling pubmed-71986902020-05-06 Strain Engineering on the Electronic and Optical Properties of WSSe Bilayer Guo, Jian Ke, Congming Wu, Yaping Kang, Junyong Nanoscale Res Lett Nano Express Controllable optical properties are important for optoelectronic applications. Based on the unique properties and potential applications of two-dimensional Janus WSSe, we systematically investigate the strain-modulated electronic and optical properties of WSSe bilayer through the first-principle calculations. The preferred stacking configurations and chalcogen orders are determined by the binding energies. The bandgap of all the stable structures are found sensitive to the external stress and could be tailored from semiconductor to metallicity under appropriate compressive strains. Atomic orbital projected energy bands reveal a positive correlation between the degeneracy and the structural symmetry, which explains the bandgap evolutions. Dipole transition preference is tuned by the biaxial strain. A controllable transformation between anisotropic and isotropic optical properties is achieved under an around − 6%~− 4% critical strain. The strain controllable electronic and optical properties of the WSSe bilayer may open up an important path for exploring next-generation optoelectronic applications. Springer US 2020-05-04 /pmc/articles/PMC7198690/ /pubmed/32367196 http://dx.doi.org/10.1186/s11671-020-03330-z Text en © The Author(s) 2020 Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Nano Express
Guo, Jian
Ke, Congming
Wu, Yaping
Kang, Junyong
Strain Engineering on the Electronic and Optical Properties of WSSe Bilayer
title Strain Engineering on the Electronic and Optical Properties of WSSe Bilayer
title_full Strain Engineering on the Electronic and Optical Properties of WSSe Bilayer
title_fullStr Strain Engineering on the Electronic and Optical Properties of WSSe Bilayer
title_full_unstemmed Strain Engineering on the Electronic and Optical Properties of WSSe Bilayer
title_short Strain Engineering on the Electronic and Optical Properties of WSSe Bilayer
title_sort strain engineering on the electronic and optical properties of wsse bilayer
topic Nano Express
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7198690/
https://www.ncbi.nlm.nih.gov/pubmed/32367196
http://dx.doi.org/10.1186/s11671-020-03330-z
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