کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5395983 | 1505735 | 2014 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electronic structure of Heusler-type Fe2V1+xAl1âx thermoelectric materials
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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چکیده انگلیسی
We have investigated the electronic structure of the off-stoichiometric Fe2V1+xAl1âx alloys by high-resolution synchrotron radiation photoelectron spectroscopy (SR-PES) measurements in order to clarify the origin of the improvement in their thermoelectric properties. SR-PES results show that, for the Al-rich (hole-doping: x < 0) case, the change of the electronic structure can be explained by the rigid band model, while, for the V-rich (electron-doping: x > 0) case, the electronic structure is modified and the pseudo-gap widens with increasing V/Al substitution. The stability of the Heusler-type crystal structure and the modification of the electronic structure due to strongly correlated effects are possible factors contributing to the improvement in the thermoelectric properties of the n-type off-stoichiometric Fe2V1+xAl1âx alloys.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electron Spectroscopy and Related Phenomena - Volume 195, August 2014, Pages 185-188
Journal: Journal of Electron Spectroscopy and Related Phenomena - Volume 195, August 2014, Pages 185-188
نویسندگان
Hidetoshi Miyazaki, Krystel Renard, Manabu Inukai, Kazuo Soda, Yoichi Nishino,