Synthesis of new silicene structure and its energy band properties.
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| Title: | Synthesis of new silicene structure and its energy band properties. |
|---|---|
| Authors: | Huang, Wei-Qi (AUTHOR) wqhuang@gzu.edu.cn, Liu, Shi-Rong (AUTHOR), Peng, Hong-Yan (AUTHOR), Li, Xin (AUTHOR), Huang, Zhong-Mei (AUTHOR) |
| Source: | Chinese Physics B. Jul2020, Vol. 29 Issue 8, p1-6. 6p. |
| Subjects: | Energy bands, Electron beams, Pulsed laser deposition, Nanodiamonds, Lattice constants, Bond angles, Dynamic stability |
| Abstract: | Silicene, silicon analogue to graphene which possesses a two-dimensional (2D) hexagonal lattice, has attracted increasing attention in the last few years due to predicted unique properties. However, silicon naturally possesses a three-dimensional (3D) diamond structure, so there seems to be not any natural solid phase of silicon similar to graphite. Here we report the synthesis of new silicene structure with a unique rectangular lattice by using a coherent electron beam to irradiate amorphous silicon nanofilm produced by pulsed laser deposition (PLD). Under the irradiation of coherent electron beam with proper kinetic energy, the surface layer of silicon nanofilm can be crystallized into silicene. The dynamic stability and the energy band properties of this new silicene structure are investigated by using first-principle calculations and density function theory (DFT) with the help of the observed crystalline structure and lattice constant. The new silicene structure has a real direct bandgap of 0.78 eV. Interestingly, the simulating calculation shows that the convex bond angle is 118° in the new silicene structure with rectangular lattices. The DFT simulations reveal that this new silicene structure has a Dirac-cone-like energy band. The experimental realization of silicene and the theoretically predicted properties shed light on the silicon material with potential applications in new devices. [ABSTRACT FROM AUTHOR] |
| Copyright of Chinese Physics B is the property of IOP Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 145170716 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Synthesis of new silicene structure and its energy band properties. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Huang%2C+Wei-Qi%22">Huang, Wei-Qi</searchLink> (AUTHOR)<i> wqhuang@gzu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Liu%2C+Shi-Rong%22">Liu, Shi-Rong</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Peng%2C+Hong-Yan%22">Peng, Hong-Yan</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Xin%22">Li, Xin</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Huang%2C+Zhong-Mei%22">Huang, Zhong-Mei</searchLink> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Chinese+Physics+B%22">Chinese Physics B</searchLink>. Jul2020, Vol. 29 Issue 8, p1-6. 6p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Energy+bands%22">Energy bands</searchLink><br /><searchLink fieldCode="DE" term="%22Electron+beams%22">Electron beams</searchLink><br /><searchLink fieldCode="DE" term="%22Pulsed+laser+deposition%22">Pulsed laser deposition</searchLink><br /><searchLink fieldCode="DE" term="%22Nanodiamonds%22">Nanodiamonds</searchLink><br /><searchLink fieldCode="DE" term="%22Lattice+constants%22">Lattice constants</searchLink><br /><searchLink fieldCode="DE" term="%22Bond+angles%22">Bond angles</searchLink><br /><searchLink fieldCode="DE" term="%22Dynamic+stability%22">Dynamic stability</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Silicene, silicon analogue to graphene which possesses a two-dimensional (2D) hexagonal lattice, has attracted increasing attention in the last few years due to predicted unique properties. However, silicon naturally possesses a three-dimensional (3D) diamond structure, so there seems to be not any natural solid phase of silicon similar to graphite. Here we report the synthesis of new silicene structure with a unique rectangular lattice by using a coherent electron beam to irradiate amorphous silicon nanofilm produced by pulsed laser deposition (PLD). Under the irradiation of coherent electron beam with proper kinetic energy, the surface layer of silicon nanofilm can be crystallized into silicene. The dynamic stability and the energy band properties of this new silicene structure are investigated by using first-principle calculations and density function theory (DFT) with the help of the observed crystalline structure and lattice constant. The new silicene structure has a real direct bandgap of 0.78 eV. Interestingly, the simulating calculation shows that the convex bond angle is 118° in the new silicene structure with rectangular lattices. The DFT simulations reveal that this new silicene structure has a Dirac-cone-like energy band. The experimental realization of silicene and the theoretically predicted properties shed light on the silicon material with potential applications in new devices. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Chinese Physics B is the property of IOP Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1088/1674-1056/ab942c Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 6 StartPage: 1 Subjects: – SubjectFull: Energy bands Type: general – SubjectFull: Electron beams Type: general – SubjectFull: Pulsed laser deposition Type: general – SubjectFull: Nanodiamonds Type: general – SubjectFull: Lattice constants Type: general – SubjectFull: Bond angles Type: general – SubjectFull: Dynamic stability Type: general Titles: – TitleFull: Synthesis of new silicene structure and its energy band properties. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Huang, Wei-Qi – PersonEntity: Name: NameFull: Liu, Shi-Rong – PersonEntity: Name: NameFull: Peng, Hong-Yan – PersonEntity: Name: NameFull: Li, Xin – PersonEntity: Name: NameFull: Huang, Zhong-Mei IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 07 Text: Jul2020 Type: published Y: 2020 Identifiers: – Type: issn-print Value: 16741056 Numbering: – Type: volume Value: 29 – Type: issue Value: 8 Titles: – TitleFull: Chinese Physics B Type: main |
| ResultId | 1 |
