Structural modulation and hole distribution in Sr(14-x)Ca(x)Cu(24)O(41)

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	Structural modulation and hole distribution in Sr(14-x)Ca(x)Cu(24)O(41)
	C. Ma; H. X. Yang; L. J. Zeng; Y. Zhang; L. L. Wang; L. Chen; R. Xiong; J. Shi; J. Q. Li
	2009
发表期刊	Journal of Physics-Condensed Matter
ISSN	0953-8984
卷号	21 期号:21
摘要	Structural properties and hole distribution in the spin-ladder compound Sr(14-x)Ca(x)Cu(24)O(41) have been extensively investigated by transmission electron microscopy (TEM). The complex electron diffraction patterns and high-resolution TEM observations reveal a clear incommensurate structural modulation along the c-axis direction attributable to two mismatched sublattices; this modulation strongly depends on hole distribution in the compounds. The fine structures of the O K and Cu L(2,3) ionization edges for the Sr(14-x)Ca(x)Cu(24)O(41) compounds recorded under different conditions indicate that more doped holes reside in the chains than the ladders, and that substituting Ca for Sr atoms results in a charge redistribution between the chains and ladders. Based on the experimental findings, the theoretical results, including the partial density of states and optical conductivity spectra calculated by the density functional theory, are also discussed.
部门归属	[ma, c.; yang, h. x.; zeng, l. j.; zhang, y.; li, j. q.] chinese acad sci, inst phys, beijing natl lab condensed matter phys, beijing 100190, peoples r china. [wang, l. l.; chen, l.; xiong, r.; shi, j.] wuhan univ, dept phys, wuhan 430072, peoples r china. [shi, j.] chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china.;li, jq (reprint author), chinese acad sci, inst phys, beijing natl lab condensed matter phys, beijing 100190, peoples r china;ljq@aphy.iphy.ac.cn
关键词	Ladder Compound Sr14cu24o41 Ray-absorption Spectroscopy Electron-energy-loss Spin-ladder Cuo2 Chains Superconductivity
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文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/32177
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	C. Ma,H. X. Yang,L. J. Zeng,et al. Structural modulation and hole distribution in Sr(14-x)Ca(x)Cu(24)O(41)[J]. Journal of Physics-Condensed Matter,2009,21(21).
APA	C. Ma.,H. X. Yang.,L. J. Zeng.,Y. Zhang.,L. L. Wang.,...&J. Q. Li.(2009).Structural modulation and hole distribution in Sr(14-x)Ca(x)Cu(24)O(41).Journal of Physics-Condensed Matter,21(21).
MLA	C. Ma,et al."Structural modulation and hole distribution in Sr(14-x)Ca(x)Cu(24)O(41)".Journal of Physics-Condensed Matter 21.21(2009).