| 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 Author | Yang, Teng(yangteng@imr.ac.cn) |
| 2018-08-01 | |
| Source Publication | CHINESE PHYSICS B
 |
| ISSN | 1674-1056 |
| Volume | 27Issue:8Pages:8 |
| Abstract | Unusual 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. |
| Keyword | flexural mode quadratic dispersion long-range interaction frequency redshift dielectric screening |
| Funding Organization | Major 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 |
| DOI | 10.1088/1674-1056/27/8/086301 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Major 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 Area | Physics |
| WOS Subject | Physics, Multidisciplinary |
| WOS ID | WOS:000442029300001 |
| Publisher | IOP PUBLISHING LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/129095 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Yang, Teng |
| Affiliation | 1.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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