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    题名: Growth and magnetic properties of self-assembled (In, Mn)As quantum dots
    作者: 林諭男;Lin, I-nan;Chen, Y. F.;Lee, W. N.;Huang, J. H.;Chin, T. S.;Huang, R. T.;Chen, F. R.;Kai, J. J.;Aravind, K.;Lin, I. N.;Ku, H. C.
    贡献者: 淡江大學物理學系
    日期: 2005-07-01
    上传时间: 2009-12-31 10:36:01 (UTC+8)
    出版者: American Institute of Physics (AIP)
    摘要: Self-assembled In0.79Mn0.21As quantum dots were successfully grown on GaAs (001) substrates by low-temperature molecular beam epitaxy. Atomic force microscopy and high-resolution transmission electron microscopy confirm the formation of quantum dots. High-resolution lattice image suggests that In0.79Mn0.21As dots are single phase with zinc-blend structure. The dots exhibit typical ferromagnetic state at 5 K and demonstrate a Curie temperature of similar to 290 K which is much higher than those of (In, Mn)As diluted magnetic semiconductor alloys ever reported. The significant increase in Curie temperature can be attributed to the much higher Mn content in the dots, and the possible enhancement of the hybridization strength between the quantum confined holes in the dots and the itinerant holes in the semiconductor valence band. (c) 2005 American Vacuum Society.
    關聯: Journal of Vacuum Science & Technology B 23(4), pp.1376-1378
    DOI: 10.1116/1.1993598
    显示于类别:[物理學系暨研究所] 期刊論文


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