教師資料查詢 | 類別: 期刊論文 | 教師: 彭維鋒 Pong, Way-faung (瀏覽個人網頁)

標題:X-ray absorption fine structure studies of Hg1-xCdxTe and Hg1-xMnxTe bond lengths : Bond relaxation and structural stability of ternary alloys
學年79
學期1
出版(發表)日期1990/12/01
作品名稱X-ray absorption fine structure studies of Hg1-xCdxTe and Hg1-xMnxTe bond lengths : Bond relaxation and structural stability of ternary alloys
作品名稱(其他語言)
著者Mayanovic, R. A.; Pong, Way-faung; Bunker, B. A.
單位淡江大學物理學系
出版者College Park: American Physical Society
著錄名稱、卷期、頁數Physical Review B (Condensed Matter) 42(17), pp.11174-11182
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.
關鍵字
語言英文
ISSN0163-1829;1095-3795
期刊性質國外
收錄於SCI
產學合作
通訊作者
審稿制度
國別美國
公開徵稿
出版型式紙本;電子版
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