CAS OpenIR  > 中科院上海应用物理研究所2011-2018年
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
Source PublicationSCIENTIFIC REPORTS
ISSN2045-2322
Volume5Pages:
Subtype期刊文献
AbstractRaman 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.
KeywordAugmented-wave Method Single Dirac Cone Topological Insulators Bi2te3 Sb2te3 Surface Pseudopotentials Energy Raman
Language英语
WOS IDWOS:000363875000001
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/25051
Collection中科院上海应用物理研究所2011-2018年
Corresponding AuthorWang, L (reprint author), Ctr High Pressure Sci & Technol Adv Res, Shanghai 201203, Peoples R China.
Recommended Citation
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.,...&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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