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dc.contributor.authorLiu, Hsiang-Lin
dc.contributor.authorYang, Teng
dc.contributor.authorChen, Jyun-Han
dc.contributor.authorChen, Hsiao-Wen
dc.contributor.authorGuo, Huaihong
dc.contributor.authorSaito, Riichiro
dc.contributor.authorLi, Ming-yang
dc.contributor.authorLi, Lain-Jong
dc.date.accessioned2020-09-27T12:20:24Z
dc.date.available2020-09-27T12:20:24Z
dc.date.issued2020-09-17
dc.date.submitted2020-04-02
dc.identifier.citationLiu, H.-L., Yang, T., Chen, J.-H., Chen, H.-W., Guo, H., Saito, R., … Li, L.-J. (2020). Temperature-dependent optical constants of monolayer $${\text {MoS}}_2$$, $${\text {MoSe}}_2$$, $${\text {WS}}_2$$, and $${\text {WSe}}_2$$: spectroscopic ellipsometry and first-principles calculations. Scientific Reports, 10(1). doi:10.1038/s41598-020-71808-y
dc.identifier.issn2045-2322
dc.identifier.pmid32943656
dc.identifier.doi10.1038/s41598-020-71808-y
dc.identifier.urihttp://hdl.handle.net/10754/665321
dc.description.abstractThe temperature-dependent ([Formula: see text]) optical constants of monolayer [Formula: see text], [Formula: see text], [Formula: see text], and [Formula: see text] were investigated through spectroscopic ellipsometry over the spectral range of 0.73-6.42 eV. At room temperature, the spectra of refractive index exhibited several anomalous dispersion features below 800 nm and approached a constant value of 3.5-4.0 in the near-infrared frequency range. With a decrease in temperature, the refractive indices decreased monotonically in the near-infrared region due to the temperature-dependent optical band gap. The thermo-optic coefficients at room temperature had values from [Formula: see text] to [Formula: see text] for monolayer transition metal dichalcogenides at a wavelength of 1200 nm below the optical band gap. The optical band gap increased with a decrease in temperature due to the suppression of electron-phonon interactions. On the basis of first-principles calculations, the observed optical excitations at 4.5 K were appropriately assigned. These results provide basic information for the technological development of monolayer transition metal dichalcogenides-based photonic devices at various temperatures.
dc.description.sponsorshipH.L.L. thanks the Ministry of Science and Technology of Republic of China for its financial support under Grant-MOST 108-2112-M-003-013. T.Y. acknowledges the National Key R&D Program of China (2017YFA0206301) and the Major Program of Aerospace Advanced Manufacturing Technology Research Foundation NSFC and CASC, China (U1537204). H.G. acknowledges NSFC grant-51702146 and the Liaoning Province Doctor Startup Fund (201601325). R.S. acknowledges MEXT-Japan for Grant-JP18H01810. L.J.L. thanks the Taiwan Consortium of Emergent Crystalline Materials (TCECM), the Ministry of Science and Technology, and USA AFOSR BRI (FA238615100015).
dc.publisherSpringer Nature
dc.relation.urlhttp://www.nature.com/articles/s41598-020-71808-y
dc.rightsThis 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 license, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons license 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.
dc.rights.urihttps://creativecommons.org/licenses/by/4.0
dc.titleTemperature-dependent optical constants of monolayer [Formula: see text], [Formula: see text], [Formula: see text], and [Formula: see text]: spectroscopic ellipsometry and first-principles calculations.
dc.typeArticle
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.contributor.departmentMaterial Science and Engineering Program
dc.identifier.journalScientific reports
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionDepartment of Physics, National Taiwan Normal University, Taipei, 11677, Taiwan
dc.contributor.institutionShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016, China
dc.contributor.institutionDepartment of Physics, Tohoku University, Sendai, 980-8578, Japan
dc.contributor.institutionCollege of Sciences, Liaoning Shihua University, Fushun, 113001, China
dc.contributor.institutionResearch Center for Applied Science, Academia Sinica, Taipei, 10617, Taiwan
dc.identifier.volume10
dc.identifier.issue1
kaust.personLi, Ming-yang
kaust.personLi, Lain-Jong
dc.date.accepted2020-08-03
dc.identifier.eid2-s2.0-85091192944
refterms.dateFOA2020-09-27T12:21:45Z
dc.date.published-online2020-09-17
dc.date.published-print2020-12


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This 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 license, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons license 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.
Except where otherwise noted, this item's license is described as This 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 license, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons license 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.