论文类型：期刊论文
第一作者：ZG Chen
合写作者：NL Wang,XL Chen,JG Guo,JL Luo,P Zheng,YG Shi,G Xu,T Dong,RH Yuan
发表刊物：Physical Review B
收录刊物：SCI
学科门类：物理学
文献类型：J
卷号：83
期号：22
页面范围：220507
ISSN号：2469-9950
发表时间：2011-06-16
影响因子：3.691
摘要：We report an infrared spectroscopy study on K 0. 83 Fe 1. 53 Se 2, a semiconducting parent compound of the 245 iron selenide superconductors. The major spectral features are found to be distinctly different from all other Fe-based superconducting systems. Our measurement revealed two peculiar spectral structures: a double-peak structure between 4000 and 6000 cm− 1 and abundant phonon modes—much more than expected for a 122 structure. We elaborate that those features could be naturally explained from the blocked antiferromagnetism due to the presence of Fe vacancy ordering as determined by recent neutron-diffraction experiments. The double peaks reflect the coexistence of ferromagnetic and antiferromagnetic couplings between the neighboring Fe sites.
发布期刊链接：https://journals.aps.org/prb/abstract/10.1103/PhysRevB.83.220507