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| Optical properties and structural phase transitions of W-doped VO2(R) under pressure | |
| Zhang, HF; Guan, Z; Cheng, BY; Li, QJ; Liu, R; Zhang, J; Liu, ZX; Yang, K; Cui, T; Liu, BB | |
| 2017 | |
| Source Publication | RSC ADVANCES
 |
| ISSN | 2046-2069 |
| Volume | 7Issue:50Pages:31597-31602 |
| Subtype | 期刊论文 |
| Abstract | Weinvestigated the optical properties and structural phase transitions of W-doped VO2(R) nanoparticles under pressure based on in situ synchrotron X-ray diffraction (XRD) and infrared (IR) spectroscopy. The structural transition sequence follows VO2(R)-VO2(CaCl2- type)-VO2(Mx) and VO2(Mx)-VO2(Mx') within metallic phases, in compression and decompression processes, respectively, demonstrating that the structural transition can be decoupled from the metal-insulator transition (MIT). VO2(R) and VO2(CaCl2-type) exhibit expected behavior of increased metallicity under pressure; surprisingly, VO2(Mx) shows gradually decreased metallicity with increasing pressure and VO2(Mx') is still metallic under ambient conditions. We find that the reduced metallicity of VO2(Mx) is attributed to W-doping induced local structure distortion in the highpressure region, while the metallic properties of VO2(Mx') are associated with the enhancement of electron concentration due to the presence of W donors, which shifted the Fermi level toward the conduction band. The present results demonstrate that the structural transition is not the key factor in driving the metal-insulator transition, and provide an effective method for inducing MIT in VO2(Mx'). |
| Keyword | Metal-insulator-transition Vanadium Dioxide Temperature Dependence Transformation Nanocrystals Oxides Films |
| DOI | 10.1039/c7ra04605g |
| Indexed By | SCI |
| WOS Keyword | METAL-INSULATOR-TRANSITION ; VANADIUM DIOXIDE ; TEMPERATURE ; DEPENDENCE ; TRANSFORMATION ; NANOCRYSTALS ; OXIDES ; FILMS |
| Language | 英语 |
| WOS ID | WOS:000404076400054 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.sinap.ac.cn/handle/331007/28762 |
| Collection | 中科院上海应用物理研究所2011-2019年 |
| Recommended Citation GB/T 7714 | Zhang, HF,Guan, Z,Cheng, BY,et al. Optical properties and structural phase transitions of W-doped VO2(R) under pressure[J]. RSC ADVANCES,2017,7(50):31597-31602. |
| APA | Zhang, HF.,Guan, Z.,Cheng, BY.,Li, QJ.,Liu, R.,...&Liu, BB.(2017).Optical properties and structural phase transitions of W-doped VO2(R) under pressure.RSC ADVANCES,7(50),31597-31602. |
| MLA | Zhang, HF,et al."Optical properties and structural phase transitions of W-doped VO2(R) under pressure".RSC ADVANCES 7.50(2017):31597-31602. |
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| File Name/Size | DocType | Version | Access | License | ||
| Optical properties a（679KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Download | |
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