A study of one-dimensional incommensurate modulated structure determination in high-resolution transmission electron microscopy
文献类型：期刊论文
| 作者 | Li, XM ; Ge, BH ; Li, FH ; Luo, HQ ; Wen, HH |
| 刊名 | ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES
 |
| 出版日期 | 2014 |
| 卷号 | 70页码:563 |
| 关键词 | incommensurate modulated structures high-resolution transmission electron microscopy electron-diffraction intensity correction phase extension |
| ISSN号 | 0108-7673 |
| 通讯作者 | Li, FH (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, PO 603, Beijing 100190, Peoples R China. |
| 中文摘要 | The methods for determining incommensurate modulated structures (IMSs) in high-resolution transmission electron microscopy have been studied and improved to a level more perfect than before. This is demonstrated by means of the IMS determination for Bi2.31Sr1.69CuO6+ as an example. First, as previously, the projected potential map (PPM) of the IMS with resolution 0.2nm was obtained after image deconvolution from a [100] image. Secondly, the resolution of the PPM was enhanced to 0.1nm through phase extension combined with the electron-diffraction data so that the substitutional and displacive modulation functions could be determined. Thirdly, a (2+1)-dimensional structure model that corresponds to the [100] projected IMS was built for calculating the related partial structure factors that were utilized to correct the experimental electron-diffraction intensities for both main and satellite reflections. After three cycles of diffraction-intensity correction and phase extension, all unoverlapped atoms projected along the [100] direction in Bi2.31Sr1.69CuO6+ were resolved, and the modulations of substitution and displacement could be observed clearly. The substitution of Bi for Sr atoms at the Sr(O) columns was seen in the final PPM and verified by high-dimensional image simulation. |
| 资助信息 | National Basic Research Program of China [2006CB601001, 2011CBA001001]; National Natural Science Foundation of China [50672124, 10874207, 11104327, 11374332] |
| 语种 | 英语 |
| 公开日期 | 2015-04-14 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/58798]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Li, XM,Ge, BH,Li, FH,et al. A study of one-dimensional incommensurate modulated structure determination in high-resolution transmission electron microscopy[J]. ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES,2014,70:563. |
| APA | Li, XM,Ge, BH,Li, FH,Luo, HQ,&Wen, HH.(2014).A study of one-dimensional incommensurate modulated structure determination in high-resolution transmission electron microscopy.ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES,70,563. |
| MLA | Li, XM,et al."A study of one-dimensional incommensurate modulated structure determination in high-resolution transmission electron microscopy".ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES 70(2014):563. |
入库方式： OAI收割
来源：物理研究所
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