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Unconventional lattice dynamics in few-layer h-BN and indium iodide crystals
Hu, Gan1,2; Huang, Jian-Qi1,2; Wang, Ya-Ning1,2; Yang, Teng1,2; Dong, Bao-Juan1,2; Wang, Ji-Zhang1,2; Zhao, Bo3; Ali, Sajjad1,2; Zhang, Zhi-Dong1,2
Corresponding AuthorYang, Teng(yangteng@imr.ac.cn)
2018-08-01
Source PublicationCHINESE PHYSICS B
ISSN1674-1056
Volume27Issue:8Pages:8
AbstractUnusual quadratic dispersion of flexural vibrational mode and red-shift of Raman shift of in-plane mode with increasing layer-number are quite common and interesting in low-dimensional materials, but their physical origins still remain open questions. Combining ab initio density functional theory calculations with the empirical force-constant model, we study the lattice dynamics of two typical two-dimensional (2D) systems, few-layer h-BN and indium iodide (InI). We found that the unusual quadratic dispersion of flexural mode frequency on wave vector may be comprehended based on the competition between atomic interactions of different neighbors. Long-range interaction plays an essential role in determining the dynamic stability of the 2D systems. The frequency red-shift of in-plane Raman-active mode from monolayer to bulk arises mainly from the reduced long-range interaction due to the increasing screening effect.
Keywordflexural mode quadratic dispersion long-range interaction frequency redshift dielectric screening
Funding OrganizationMajor Program of Aerospace Advanced Manufacturing Technology Research Foundation from NSFC and CASC, China ; National Key Research and Development Program of China ; National Natural Science Foundation of China
DOI10.1088/1674-1056/27/8/086301
Indexed BySCI
Language英语
Funding ProjectMajor Program of Aerospace Advanced Manufacturing Technology Research Foundation from NSFC and CASC, China[U1537204] ; National Key Research and Development Program of China[2017YFA0206301] ; National Natural Science Foundation of China[51702146]
WOS Research AreaPhysics
WOS SubjectPhysics, Multidisciplinary
WOS IDWOS:000442029300001
PublisherIOP PUBLISHING LTD
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/129095
Collection中国科学院金属研究所
Corresponding AuthorYang, Teng
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China
3.Liaoning Shihua Univ, Coll Sci, Fushun 113001, Peoples R China
Recommended Citation
GB/T 7714
Hu, Gan,Huang, Jian-Qi,Wang, Ya-Ning,et al. Unconventional lattice dynamics in few-layer h-BN and indium iodide crystals[J]. CHINESE PHYSICS B,2018,27(8):8.
APA Hu, Gan.,Huang, Jian-Qi.,Wang, Ya-Ning.,Yang, Teng.,Dong, Bao-Juan.,...&Zhang, Zhi-Dong.(2018).Unconventional lattice dynamics in few-layer h-BN and indium iodide crystals.CHINESE PHYSICS B,27(8),8.
MLA Hu, Gan,et al."Unconventional lattice dynamics in few-layer h-BN and indium iodide crystals".CHINESE PHYSICS B 27.8(2018):8.
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