X-ray absorption fine structure studies of Hg1-xCdxTe and Hg1-xMnxTe bond lengths : Bond relaxation and structural stability of ternary alloys

doi:10.1103/PhysRevB.42.11174

淡江大學機構典藏 > 理學院 > 物理學系暨研究所 > 期刊論文 > Item 987654321/27765

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题名:	X-ray absorption fine structure studies of Hg1-xCdxTe and Hg1-xMnxTe bond lengths : Bond relaxation and structural stability of ternary alloys
作者:	Mayanovic, R. A.;Pong, Way-faung;Bunker, B. A.
贡献者:	淡江大學物理學系
日期:	1990-12
上传时间:	2013-07-09 15:05:52 (UTC+8)
出版者:	College Park: American Physical Society
摘要:	Bond lengths in the narrow-band-gap semiconductor alloys Hg1-xCdxTe and Hg1-xMnxTe have been deduced using x-ray-absorption fine-structure techniques. The nearest-neighbor bond lengths, for both alloy systems, are found to be constant as a function of alloy composition within the experimental uncertainties of 0.01 Å. These results contradict the predictions of some recent theories for Hg1-xCdxTe alloys, finding the Hg-Te and Cd-Te bond lengths to be decreasing in spite of the lattice constant increasing with x. The bond relaxation in several III-V, II-VI, and II-VI-based diluted magnetic semiconductor (DMS) ternary alloys is found to be quantitatively proportional to the ratio of bond bending to bond-stretching force constants. Hg1-xCdxTe and DMS alloys, including Hg1-xMnxTe, are found to have the largest amount of bond relaxation. For DMS's, this is attributed to tetrahedral bond weakening resulting from hybridization of anion p and Mn 3d orbitals thereby decreasing the amount of charge available for the making of sp3 bonds.
關聯:	Physical Review B (Condensed Matter) 42(17), pp.11174-11182
DOI:	10.1103/PhysRevB.42.11174
显示于类别:	[物理學系暨研究所] 期刊論文

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