IMR OpenIR
Quantitative Analysis of Temperature Dependence of Raman shift of monolayer WS2
Huang, XT; Gao, Y; Yang, TQ; Ren, WC; Cheng, HM; Lai, TS; Lai, TS (reprint author), Sun Yat Sen Univ, Sch Phys, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Guangdong, Peoples R China.; Ren, WC (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
2016-08-31
Source PublicationSCIENTIFIC REPORTS
ISSN2045-2322
Volume6
AbstractWe report the temperature-dependent evolution of Raman spectra of monolayer WS2 directly CVD-grown on a gold foil and then transferred onto quartz substrates over a wide temperature range from 84 to 543 K. The nonlinear temperature dependence of Raman shifts for both E-2g(1) and A(1g) modes has been observed. The first-order temperature coefficients of Raman shifts are obtained to be -0.0093 (cm(-1)/K) and -0.0122 (cm(-1)/K) for E-2g(1) and A(1g) peaks, respectively. A physical model, including thermal expansion and three-and four-phonon anharmonic effects, is used quantitatively to analyze the observed nonlinear temperature dependence. Thermal expansion coefficient (TEC) of monolayer WS2 is extracted from the experimental data for the first time. It is found that thermal expansion coefficient of out-plane mode is larger than one of in-plane mode, and TECs of E-2g(1) and A(1g) modes are temperature-dependent weakly and strongly, respectively. It is also found that the nonlinear temperature dependence of Raman shift of E-2g(1) mode mainly originates from the anharmonic effect of three-phonon process, whereas one of A(1g) mode is mainly contributed by thermal expansion effect in high temperature region, revealing that thermal expansion effect cannot be ignored.
description.department[huang, xiaoting ; yang, tianqi ; lai, tianshu] sun yat sen univ, sch phys, state key lab optoelect mat & technol, guangzhou 510275, guangdong, peoples r china ; [gao, yang ; ren, wencai ; cheng, hui-ming] chinese acad sci, shenyang natl lab mat sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china
Subject AreaMultidisciplinary Sciences
Funding OrganizationNational Basic Research Program of China [2013CB922403]; National Natural Science Foundation of China [11274399, 61475195, 51325205, 51290273]; Guangdong Natural Science Foundation, China [2014A030311029]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/76296
Collection中国科学院金属研究所
Corresponding AuthorLai, TS (reprint author), Sun Yat Sen Univ, Sch Phys, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Guangdong, Peoples R China.; Ren, WC (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
Recommended Citation
GB/T 7714
Huang, XT,Gao, Y,Yang, TQ,et al. Quantitative Analysis of Temperature Dependence of Raman shift of monolayer WS2[J]. SCIENTIFIC REPORTS,2016,6.
APA Huang, XT.,Gao, Y.,Yang, TQ.,Ren, WC.,Cheng, HM.,...&Ren, WC .(2016).Quantitative Analysis of Temperature Dependence of Raman shift of monolayer WS2.SCIENTIFIC REPORTS,6.
MLA Huang, XT,et al."Quantitative Analysis of Temperature Dependence of Raman shift of monolayer WS2".SCIENTIFIC REPORTS 6(2016).
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Huang, XT]'s Articles
[Gao, Y]'s Articles
[Yang, TQ]'s Articles
Baidu academic
Similar articles in Baidu academic
[Huang, XT]'s Articles
[Gao, Y]'s Articles
[Yang, TQ]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Huang, XT]'s Articles
[Gao, Y]'s Articles
[Yang, TQ]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.