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Pressure-induced changes in the electron density distribution in alpha-Ge near the alpha-beta transition
Li R(李蕊); Liu J(刘景); Li, R; Liu, J; Bai, LG; Tse, JS; Shen, GY
2015
Source PublicationAPPLIED PHYSICS LETTERS
ISSN0003-6951
EISSN1077-3118
Volume107Issue:7Pages:72109
SubtypeArticle
AbstractElectron density distributions in alpha-Ge have been determined under high pressure using maximum entropy method with structure factors obtained from single crystal synchrotron x-ray diffraction in a diamond anvil cell. The results show that the sp(3) bonding is enhanced with increasing pressure up to 7.7(1) GPa. At higher pressures but below the alpha-beta transition pressure of 11.0(1) GPa, the sp(3)-like electron distribution progressively weakens with a concomitant increase of d-orbitals hybridization. The participation of d-orbitals in the electronic structure is supported by Ge K beta(2) (4p-1s) x-ray emission spectroscopy measurements showing the reduction of 4s character in the valence band at pressures far below the alpha-beta transition. The gradual increase of d-orbitals in the valence level in the stability field of alpha-Ge is directly related to the eventual structural transition. (C) 2015 AIP Publishing LLC.
Subject AreaPhysics
DOI10.1063/1.4929368
Indexed BySCI ; ADS ; EI ; CA
Language英语
WOS Research AreaPhysics, Applied
WOS SubjectPhysics
WOS IDWOS:000360390500028
ADS Bibcode2015ApPhL.107g2109L
ADS URLhttps://ui.adsabs.harvard.edu/abs/2015ApPhL.107g2109L
ADS CITATIONShttps://ui.adsabs.harvard.edu/abs/2015ApPhL.107g2109L/citations
Citation statistics
Cited Times:8 [ADS]
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/228755
Collection中国科学院高能物理研究所
Recommended Citation
GB/T 7714
Li R,Liu J,Li, R,et al. Pressure-induced changes in the electron density distribution in alpha-Ge near the alpha-beta transition[J]. APPLIED PHYSICS LETTERS,2015,107(7):72109.
APA 李蕊.,刘景.,Li, R.,Liu, J.,Bai, LG.,...&Shen, GY.(2015).Pressure-induced changes in the electron density distribution in alpha-Ge near the alpha-beta transition.APPLIED PHYSICS LETTERS,107(7),72109.
MLA 李蕊,et al."Pressure-induced changes in the electron density distribution in alpha-Ge near the alpha-beta transition".APPLIED PHYSICS LETTERS 107.7(2015):72109.
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