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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...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer US
2020
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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. |
format | Online Article Text |
id | pubmed-7198690 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Springer US |
record_format | MEDLINE/PubMed |
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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