Structural phase transitions in Bi2Se3 under high pressure
文献类型：期刊论文
| 作者 | Yu, ZH; Wang, L; Hu, QY; Zhao, JG; Yan, S; Yang, K; Sinogeikin, S; Gu, GD; Mao, HK |
| 刊名 | SCIENTIFIC REPORTS
 |
| 出版日期 | 2015 |
| 卷号 | 5页码:— |
| 关键词 | AUGMENTED-WAVE METHOD SINGLE DIRAC CONE TOPOLOGICAL INSULATORS BI2TE3 SB2TE3 SURFACE PSEUDOPOTENTIALS ENERGY RAMAN |
| ISSN号 | 2045-2322 |
| 通讯作者 | Wang, L (reprint author), Ctr High Pressure Sci & Technol Adv Res, Shanghai 201203, Peoples R China. |
| 英文摘要 | Raman spectroscopy and angle dispersive X-ray diffraction (XRD) experiments of bismuth selenide (Bi2Se3) have been carried out to pressures of 35.6 and 81.2 GPa, respectively, to explore its pressure-induced phase transformation. The experiments indicate that a progressive structural evolution occurs from an ambient rhombohedra phase (Space group (SG): R-3m) to monoclinic phase (SG: C2/m) and eventually to a high pressure body-centered tetragonal phase (SG: I4/mmm). Evidenced by our XRD data up to 81.2 GPa, the Bi2Se3 crystallizes into body-centered tetragonal structures rather than the recently reported disordered body-centered cubic (BCC) phase. Furthermore, first principles theoretical calculations favor the viewpoint that the I4/mmm phase Bi2Se3 can be stabilized under high pressure (>30 GPa). Remarkably, the Raman spectra of Bi2Se3 from this work (two independent runs) are still Raman active up to similar to 35 GPa. It is worthy to note that the disordered BCC phase at 27.8 GPa is not observed here. The remarkable difference in atomic radii of Bi and Se in Bi2Se3 may explain why Bi2Se3 shows different structural behavior than isocompounds Bi2Te3 and Sb2Te3. |
| 语种 | 英语 |
| WOS记录号 | WOS:000363875000001 |
| 公开日期 | 2016-03-08 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/25051]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 推荐引用方式 GB/T 7714 | Yu, ZH,Wang, L,Hu, QY,et al. Structural phase transitions in Bi2Se3 under high pressure[J]. SCIENTIFIC REPORTS,2015,5:—. |
| APA | Yu, ZH.,Wang, L.,Hu, QY.,Zhao, JG.,Yan, S.,...&Mao, HK.(2015).Structural phase transitions in Bi2Se3 under high pressure.SCIENTIFIC REPORTS,5,—. |
| MLA | Yu, ZH,et al."Structural phase transitions in Bi2Se3 under high pressure".SCIENTIFIC REPORTS 5(2015):—. |
入库方式： OAI收割
来源：上海应用物理研究所
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