Structural phase transitions in Bi2Se3 under high pressure
Yu, ZH; Wang, L; Hu, QY; Zhao, JG; Yan, S; Yang, K; Sinogeikin, S; Gu, GD; Mao, HK; Wang, L (reprint author), Ctr High Pressure Sci & Technol Adv Res, Shanghai 201203, Peoples R China.
2015
发表期刊SCIENTIFIC REPORTS
ISSN2045-2322
卷号5页码:
文章类型期刊文献
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.
关键词Augmented-wave Method Single Dirac Cone Topological Insulators Bi2te3 Sb2te3 Surface Pseudopotentials Energy Raman
语种英语
WOS记录号WOS:000363875000001
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被引频次:16[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/25051
专题中科院上海应用物理研究所2011-2018年
通讯作者Wang, L (reprint author), Ctr High Pressure Sci & Technol Adv Res, Shanghai 201203, Peoples R China.
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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.,...&Wang, L .(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):—.
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