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Article: Anharmonic lattice dynamics and thermal transport of monolayer InSe under equibiaxial tensile strains

TitleAnharmonic lattice dynamics and thermal transport of monolayer InSe under equibiaxial tensile strains
Authors
Issue Date2020
PublisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/Journals/jpcm
Citation
Journal of Physics: Condensed Matter, 2020, v. 32 n. 47, p. article no. 475702 How to Cite?
AbstractTwo-dimensional (2D) InSe, which exhibits high electron mobility and a wide band gap has emerged as a promising material for photoelectric and thermoelectric applications. The inadequate understanding of the lattice thermal conductivity (κ), however, hampers the advancement of 2D InSe. Herein, by taking into account anharmonicity up to the fourth order and introducing the equibiaxial tensile strain (epsilon), we have performed an in-depth study on the lattice dynamics of 2D InSe. Interestingly, the κ exhibits a non-monotonic behaviour as a function of equibiaxial tensile strain, which can be attributed to the changes in acoustic phonon lifetimes. At the Γ point, a blue-shift of the lowest optical mode and a red-shift of the uppermost optical mode are reported for the first time. More strikingly, the blue-shift can be largely suppressed by equibiaxial tensile strain. Further study indicates that the unique transition of the potential energy surface is responsible for the disappearance of the blue-shift. Our work may enlighten the future research on phonon engineering and management of the lattice thermal conductivity of 2D InSe.
Persistent Identifierhttp://hdl.handle.net/10722/300593
ISSN
2023 Impact Factor: 2.3
2023 SCImago Journal Rankings: 0.676
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorZENG, Z-
dc.contributor.authorLI, S-
dc.contributor.authorTadano, T-
dc.contributor.authorChen, Y-
dc.date.accessioned2021-06-18T14:54:13Z-
dc.date.available2021-06-18T14:54:13Z-
dc.date.issued2020-
dc.identifier.citationJournal of Physics: Condensed Matter, 2020, v. 32 n. 47, p. article no. 475702-
dc.identifier.issn0953-8984-
dc.identifier.urihttp://hdl.handle.net/10722/300593-
dc.description.abstractTwo-dimensional (2D) InSe, which exhibits high electron mobility and a wide band gap has emerged as a promising material for photoelectric and thermoelectric applications. The inadequate understanding of the lattice thermal conductivity (κ), however, hampers the advancement of 2D InSe. Herein, by taking into account anharmonicity up to the fourth order and introducing the equibiaxial tensile strain (epsilon), we have performed an in-depth study on the lattice dynamics of 2D InSe. Interestingly, the κ exhibits a non-monotonic behaviour as a function of equibiaxial tensile strain, which can be attributed to the changes in acoustic phonon lifetimes. At the Γ point, a blue-shift of the lowest optical mode and a red-shift of the uppermost optical mode are reported for the first time. More strikingly, the blue-shift can be largely suppressed by equibiaxial tensile strain. Further study indicates that the unique transition of the potential energy surface is responsible for the disappearance of the blue-shift. Our work may enlighten the future research on phonon engineering and management of the lattice thermal conductivity of 2D InSe.-
dc.languageeng-
dc.publisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/Journals/jpcm-
dc.relation.ispartofJournal of Physics: Condensed Matter-
dc.rightsJournal of Physics: Condensed Matter. Copyright © Institute of Physics Publishing.-
dc.rightsThis is an author-created, un-copyedited version of an article published in [insert name of journal]. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at http://dx.doi.org/[insert DOI].-
dc.titleAnharmonic lattice dynamics and thermal transport of monolayer InSe under equibiaxial tensile strains-
dc.typeArticle-
dc.identifier.emailChen, Y: yuechen@hku.hk-
dc.identifier.authorityChen, Y=rp01925-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1088/1361-648X/aba315-
dc.identifier.pmid32877375-
dc.identifier.scopuseid_2-s2.0-85092044835-
dc.identifier.hkuros322942-
dc.identifier.volume32-
dc.identifier.issue47-
dc.identifier.spagearticle no. 475702-
dc.identifier.epagearticle no. 475702-
dc.identifier.isiWOS:000568289000001-
dc.publisher.placeUnited Kingdom-

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