Electronic structures of double perovskites Sr-2(Fe1-zMnz)MoO6: Doping-dependent optical studies
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SCOPUS
- Title
- Electronic structures of double perovskites Sr-2(Fe1-zMnz)MoO6: Doping-dependent optical studies
- Authors
- Jung, JH; Oh, SJ; Kim, MW; Noh, TW; Kim, JY; Park, JH; Lin, HJ; Chen, CT; Moritomo, Y
- Date Issued
- 2002-09-01
- Publisher
- AMERICAN PHYSICAL SOC
- Abstract
- We investigated the optical conductivity spectra sigma(omega) of double perovskites Sr-2(Fe1-zMnz)MoO6, which show filling controlled metal-insulator transition. Based on systematic analyses of optical conductivity and O 1s x-ray absorption spectroscopy, the electronic structures of both Sr2FeMoO6 and Sr2MnMoO6 near the Fermi level are presented, which turn out to agree with the recent LSDA+U calculation results [H. Wu, Phys. Rev. B 64, 125126 (2001)]. With the Mo carrier doping (with z decreasing), the in-gap spectral weight is formed, below the gap of Sr2MnMoO6, and finally developed into a Drude peak in Sr2FeMoO6. Due to the possible site disorder, finite energy peaks rather than Drude-like peaks were observed for most of the doping ranges 0.2less than or equal tozless than or equal to0.8. With the ferrimagnetic ordering, we observed redistribution of spectral weight over a wide energy region from 0 to 3 eV. The high energy spectral weight was transferred to the low energy region, similar to the manganites. We discussed possible scenarios relevant to the Fe-Mo hybridization.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/12089
- DOI
- 10.1103/PHYSREVB.66.104415
- ISSN
- 1098-0121
- Article Type
- Article
- Citation
- PHYSICAL REVIEW B, vol. 66, no. 10, 2002-09-01
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