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Article: Band engineering and hybridization of competing arsenene allotropes: a computational study

TitleBand engineering and hybridization of competing arsenene allotropes: a computational study
Authors
KeywordsElectronic properties
Electronic structure
Energy gap
Metal insulator boundaries
Metal insulator transition
Issue Date2019
PublisherRoyal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/pccp
Citation
Physical Chemistry Chemical Physics, 2019, v. 21 n. 44, p. 24499-24505 How to Cite?
AbstractArsenene is an emerging two-dimensional material similar to its group-V isologue phosphorene. Based on first-principles calculations and finite-temperature ab initio molecular dynamics (AIMD), we investigated the dynamical stability and electronic properties of three competing phases of two-dimensional (2D) arsenic, namely γ-As, the newly discovered δ′-As, and s/o-As. Phonon calculations and AIMD results confirm their dynamical stabilities. It is also found that the band structures of these allotropes can be effectively engineered by changing the number of layers or in-layer strain, realizing direct–indirect bandgap and metal–insulator transitions. The highly tunable electronic structures and the broad range bandgaps evidence potential applications in nanoelectronics and optoelectronics. Moreover, δ′-As is predicted to transform to a higher symmetry δ-As phase when the number of layers is sufficiently large. An intriguing phenomenon unveiled is the potential hybridization of different allotropes at an energy cost lower than 0.02 eV Å−1. This becomes particularly valuable for assembling heterostructures with different well-defined regions in one contiguous arsenene layer.
Persistent Identifierhttp://hdl.handle.net/10722/283387
ISSN
2019 Impact Factor: 3.43
2015 SCImago Journal Rankings: 1.836

 

DC FieldValueLanguage
dc.contributor.authorMAO, J-
dc.contributor.authorChen, Y-
dc.date.accessioned2020-06-22T02:55:48Z-
dc.date.available2020-06-22T02:55:48Z-
dc.date.issued2019-
dc.identifier.citationPhysical Chemistry Chemical Physics, 2019, v. 21 n. 44, p. 24499-24505-
dc.identifier.issn1463-9076-
dc.identifier.urihttp://hdl.handle.net/10722/283387-
dc.description.abstractArsenene is an emerging two-dimensional material similar to its group-V isologue phosphorene. Based on first-principles calculations and finite-temperature ab initio molecular dynamics (AIMD), we investigated the dynamical stability and electronic properties of three competing phases of two-dimensional (2D) arsenic, namely γ-As, the newly discovered δ′-As, and s/o-As. Phonon calculations and AIMD results confirm their dynamical stabilities. It is also found that the band structures of these allotropes can be effectively engineered by changing the number of layers or in-layer strain, realizing direct–indirect bandgap and metal–insulator transitions. The highly tunable electronic structures and the broad range bandgaps evidence potential applications in nanoelectronics and optoelectronics. Moreover, δ′-As is predicted to transform to a higher symmetry δ-As phase when the number of layers is sufficiently large. An intriguing phenomenon unveiled is the potential hybridization of different allotropes at an energy cost lower than 0.02 eV Å−1. This becomes particularly valuable for assembling heterostructures with different well-defined regions in one contiguous arsenene layer.-
dc.languageeng-
dc.publisherRoyal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/pccp-
dc.relation.ispartofPhysical Chemistry Chemical Physics-
dc.subjectElectronic properties-
dc.subjectElectronic structure-
dc.subjectEnergy gap-
dc.subjectMetal insulator boundaries-
dc.subjectMetal insulator transition-
dc.titleBand engineering and hybridization of competing arsenene allotropes: a computational study-
dc.typeArticle-
dc.identifier.emailChen, Y: yuechen@hku.hk-
dc.identifier.authorityChen, Y=rp01925-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1039/C9CP04961D-
dc.identifier.pmid31687701-
dc.identifier.scopuseid_2-s2.0-85075108110-
dc.identifier.hkuros310525-
dc.identifier.volume21-
dc.identifier.issue44-
dc.identifier.spage24499-
dc.identifier.epage24505-
dc.publisher.placeUnited Kingdom-

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