Effects of Zn substitution on the electronic structure of BaFe2As2 revealed by angle-resolved photoemission spectroscopy
In Fe-based superconductors, electron doping is often realized by the substitution of transition-metal atoms for Fe. In order to investigate how the electronic structure of the parent compound is influenced by Zn substitution, which supplies nominally four extra electrons per substituted atom but is...
محفوظ في:
| المؤلف الرئيسي: | |
|---|---|
| مؤلفون آخرون: | , , , , , , , |
| التنسيق: | article |
| منشور في: |
2013
|
| الوصول للمادة أونلاين: | http://hdl.handle.net/10725/16654 https://doi.org/10.1103/PhysRevB.87.201110 http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php https://journals.aps.org/prb/abstract/10.1103/PhysRevB.87.201110 |
| الوسوم: |
إضافة وسم
لا توجد وسوم, كن أول من يضع وسما على هذه التسجيلة!
|
| الملخص: | In Fe-based superconductors, electron doping is often realized by the substitution of transition-metal atoms for Fe. In order to investigate how the electronic structure of the parent compound is influenced by Zn substitution, which supplies nominally four extra electrons per substituted atom but is expected to induce the strongest impurity potential among the transition-metal atoms, we have performed an angle-resolved photoemission spectroscopy measurement on Ba(Fe1−Zn)2As2 (Zn-122). In Zn-122, the temperature dependence of the resistivity shows a kink around ∼ 135 K, indicating antiferromagnetic order below the N ́ e el temperature of N∼ 135 K. In fact, folded Fermi surfaces (FSs) similar to those of the parent compound have been observed below N. The hole and electron FS volumes are, therefore, different from those expected from the rigid-band model. The results can be understood if all the extra electrons occupy the Zn 3 state ∼10 eV below the Fermi level and do not participate in the formation of the FSs. |
|---|