An accurate analytical approach to electron crystallography

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	An accurate analytical approach to electron crystallography
	Q. B. Yang; Y. M. Wang; Q. X. Liu; X. H. Yan
	2001
发表期刊	Ultramicroscopy
ISSN	0304-3991
卷号	87 期号:4 页码:177-186
摘要	A much more accurate analytical expression of dynamical electron diffraction than the phase object approximation (POA) formula has been derived in this paper which decreases the restriction of sample thickness up to almost one order of magnitude compared to POA theory. The importance of the new expression is twofold. First, a sample with such a thickness that new expression remains valid can be prepared experimentally. Second, the new expression reveals a clear and straightforward relationship between the wave function and crystal potential. In the expression, the effect of dynamical diffraction on wave function can be simply attributed to two factors T-P((D))=(sin(lambda pi zg(2)))/(4 pi (2)g(2)) and T-A((D)) = [1 - cos(lambda pi zg(2))]/4 pi (2)g(2). Compared to the effect of transfer functions of an electron microscope on wave function, we found that T-P((d)) and T-A((d)) play the same role as transfer function but an independent of the instrument. For this reason, we here call the former as "extrinsic transfer functions" and the latter as "intrinsic" ones. In principle, one should correct not only extrinsic transfer functions but also intrinsic ones if one desires to achieve higher resolution. (C) 2001 Elsevier Science B.V. All rights reserved.
部门归属	xiangtan univ, inst modern phys, xiangtan 411105, peoples r china. chinese acad sci, inst phys, beijing lab electron microscopy, beijing 100080, peoples r china. chinese acad sci, inst met res, atom imaging solids lab, shenyang 110015, peoples r china. chinese acad sci, ctr condensed matter phys, beijing 100080, peoples r china.;yang, qb (reprint author), xiangtan univ, inst modern phys, xiangtan 411105, peoples r china
关键词	Dynamical Electron Diffraction Electron Crystallography Angstrom-resolution Ribosomal-subunit Microscopy Micrographs Holography Simulation Complex
URL	查看原文
WOS记录号	WOS:000168299800002
引用统计	被引频次：14[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/36861
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Q. B. Yang,Y. M. Wang,Q. X. Liu,et al. An accurate analytical approach to electron crystallography[J]. Ultramicroscopy,2001,87(4):177-186.
APA	Q. B. Yang,Y. M. Wang,Q. X. Liu,&X. H. Yan.(2001).An accurate analytical approach to electron crystallography.Ultramicroscopy,87(4),177-186.
MLA	Q. B. Yang,et al."An accurate analytical approach to electron crystallography".Ultramicroscopy 87.4(2001):177-186.