Controllable phase-transition temperature upon strain release in VO2/MgF2 epitaxial films
文献类型：期刊论文
| 作者 | Shao, ZW; Wang, LL; Chang, TC; Xu, F; Sun, GY; Jin, P; Cao, X |
| 刊名 | JOURNAL OF APPLIED PHYSICS
 |
| 出版日期 | 2020-07-28 |
| 期号 | 4 |
| ISSN号 | 0021-8979 |
| DOI | 10.1063/5.0011423 |
| 文献子类 | Article |
| 英文摘要 | Metal-to-insulator transition (MIT) behaviors accompanied by a rapidly reversible phase transition in vanadium dioxide (VO2) have gained much attention from researchers. In this research, lattice-mismatched epitaxial films of VO2 (210) on MgF2 (111) substrates exhibited different phase-transition temperatures and developed a phase regulation of misfit dislocations. It reveals an "effective phase-transition regulation" for VO2 films with different thicknesses in certain substrates-MgF2. It is speculated that the dislocation density could progressively increase with the increasing thickness of the film, and the dislocation spacing distribution tends to become narrower. When the thickness of the film is close to a certain thickness, the misfit dislocation density is close to saturation for full relaxation. The misfit dislocation arrangement produces hysteresis loops of different widths upon resistance and transmittance: when the width of the transmittance hysteresis loop is narrow at 3.9 degrees C, and the resistance hysteresis loop can reach the largest width at 14.0 degrees C. Further research about the hysteresis with other substrates and the thickness-dependent transition temperature showed that the variance of hysteresis properties during the phase transition can be ascribed to the different strain states along the V-V chains and the change of the hybrid t(2g)-orbital occupancy. In addition, critical thickness along the growth direction is also discussed, which could be identified by the experimental results. This research provides a comprehensive understanding of the strain effect on phase-transition behaviors and also could be a guidance for some potential applications in optoelectronic devices. |
| WOS关键词 | METAL-INSULATOR DOMAINS ; ORGANIZATION ; MULTILAYERS ; DEFECTS |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| 出版者 | AMER INST PHYSICS |
| 源URL | [http://ir.sic.ac.cn/handle/331005/27885]  |
| 专题 | 中国科学院上海硅酸盐研究所 |
| 推荐引用方式 GB/T 7714 | Shao, ZW,Wang, LL,Chang, TC,et al. Controllable phase-transition temperature upon strain release in VO2/MgF2 epitaxial films[J]. JOURNAL OF APPLIED PHYSICS,2020(4). |
| APA | Shao, ZW.,Wang, LL.,Chang, TC.,Xu, F.,Sun, GY.,...&Cao, X.(2020).Controllable phase-transition temperature upon strain release in VO2/MgF2 epitaxial films.JOURNAL OF APPLIED PHYSICS(4). |
| MLA | Shao, ZW,et al."Controllable phase-transition temperature upon strain release in VO2/MgF2 epitaxial films".JOURNAL OF APPLIED PHYSICS .4(2020). |
入库方式： OAI收割
来源：上海硅酸盐研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。