کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9585410 | 1505782 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Soft X-ray investigation of strongly correlated electron systems
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Soft X-ray spectroscopy plays an important role for understanding the electronic structure of correlated electron materials. We review two examples of soft X-ray spectroscopic investigation on electron correlations and orbital symmetry in transition-metal oxides. The measurements show the existence of Coulomb correlations in CrO2 and the Mott-Hubbard character of 3d electrons. We conclude that CrO2 has a dualistic electronic nature, in which the states at the Fermi level are bandlike and while those at higher energies are strongly localized of completely different origin and symmetry. In addition, we demonstrate that linear dichroism in Mn 2p X-ray absorption is a powerful method to test the validity of models for orbital ordering in transition-metal oxides. Our linear dichroism measurements indicate that orbital ordering of the Mn eg electrons in La0.5Sr1.5MnO4 is dominated by x2âz2/y2âz2 type of ordering.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electron Spectroscopy and Related Phenomena - Volumes 144â147, June 2005, Pages 331-336
Journal: Journal of Electron Spectroscopy and Related Phenomena - Volumes 144â147, June 2005, Pages 331-336
نویسندگان
D.J. Huang, C.T. Chen,