کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7839539 | 1505711 | 2017 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Valence transition in polycrystalline Eu(Rh1-xCox)2Si2 studied by hard x-ray photoemission spectroscopy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Valence transition in polycrystalline Eu(Rh1-xCox)2Si2 studied by hard x-ray photoemission spectroscopy Valence transition in polycrystalline Eu(Rh1-xCox)2Si2 studied by hard x-ray photoemission spectroscopy](/preview/png/7839539.png)
چکیده انگلیسی
We have investigated bulk-derived electronic structure of the valence transition system Eu(Rh1-xCox)2Si2 with x = 0 and 0.4 by means of hard x-ray photoemission spectroscopy. The Eu mean valence evaluated from the Eu 3d spectrum for x = 0.4 gradually changes from 2.57 at 300 K to 2.92 at 20 K. On the other hand, the valence for x = 0 retains â¼2.1 in the temperature range from 300 to 20 K. Furthermore, the Eu2+ 4f component in the valence band for x = 0.4 was shifted by 150 meV towards the Fermi level compared to that for x = 0. Present results suggest that the increase in the hybridization strength between Eu 4f and conduction electrons induces the valence transition, which is consistent with the Kondo volume collapse model.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electron Spectroscopy and Related Phenomena - Volume 220, October 2017, Pages 28-32
Journal: Journal of Electron Spectroscopy and Related Phenomena - Volume 220, October 2017, Pages 28-32
نویسندگان
Katsuya Ichiki, Takayuki Matsumoto, Hiroaki Anzai, Ryohei Takeshita, Kodai Abe, Suzuna Ishihara, Takayuki Uozumi, Hitoshi Sato, Awabaikeli Rousuli, Shigenori Ueda, Yukihiro Taguchi, Kenya Shimada, Hirofumi Namatame, Masaki Taniguchi, Suguru Hamano,