کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5424064 | 1395812 | 2009 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Energy surfaces of rare-earth silicide films on Si(1Â 1Â 1)
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We report on angle-resolved photoelectron spectroscopy results of thin dysprosium-silicide layers formed on Si(1 1 1), taken with a toroidal analyzer allowing to image the energy surfaces in k||-space. At monolayer dysprosium coverages, where hexagonal DySi2 grows with a 1Ã1 superstructure, electron pockets are observed at the M¯ points with highly anisotropic effective masses, and around a hole pocket at the ί point also an anisotropic dispersion is found. The band filling of these two bands amounts to one, indicating an even number of electrons assigned to the surface unit cell. Similar features are found for multilayer coverages, where hexagonal Dy3Si5 layers are formed with a 3Ã3R30° superstructure. Here, the influence of zone folding effects due to the 3Ã3R30° reconstructed layers in the bulk silicide is only weak because of the high surface sensitivity of the experiments.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface Science - Volume 603, Issue 17, 1 September 2009, Pages 2808-2814
Journal: Surface Science - Volume 603, Issue 17, 1 September 2009, Pages 2808-2814
نویسندگان
M. Wanke, M. Franz, M. Vetterlein, G. Pruskil, B. Höpfner, C. Prohl, I. Engelhardt, P. Stojanov, E. Huwald, J.D. Riley, M. Dähne,