2016年2月2日
Nematic magnetoelastic effect contrasted between Ba(Fe1-xCox)2As2 and FeSe
Physical Review B
- 巻
- 93
- 号
- 6
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1103/PhysRevB.93.060504
- 出版者・発行元
- American Physical Society
To elucidate the origin of nematic order in Fe-based superconductors, we report a Raman scattering study of lattice dynamics, which quantify the extent of C4-symmetry breaking, in BaFe2As2 and FeSe. FeSe possesses a nematic ordering temperature Ts and orbital-related band-energy split below Ts that are similar to those in BaFe2As2, but unlike BaFe2As2 it has no long-range magnetic order. We find that the Eg phonon-energy split in FeSe becomes substantial only well below Ts, and its saturated value is much smaller than that in BaFe2As2. Together with reported results for the Ba(Fe1-xCox)2As2 family, the data suggest that magnetism exerts a major influence on the lattice.
- ID情報
-
- DOI : 10.1103/PhysRevB.93.060504
- ISSN : 2469-9969
- ISSN : 2469-9950
- SCOPUS ID : 84958231544