Common Features in Electronic Structure of the Fe-Based Layered Superconductors from Photoemission Spectroscopy
Abstract
High resolution photoemission measurements have been carried out on non-superconducting LaOFeAs parent compound and various superconducting R(O1-xFx)FeAs (R=La, Ce and Pr) compounds. We found that the parent LaOFeAs compound shows a metallic character. Through extensive measurements, we have identified several common features in the electronic structure of these Fe-based compounds: (1). 0.2 eV feature in the valence band; (2). A universal 13~16 meV feature; (3). A clear Fermi cutoff showing zero leading-edge shift in the superconducting state;(4). Lack of superconducting coherence peak(s); (5). Near EF spectral weight suppression with decreasing temperature. These universal features can provide important information about band structure, superconducting gap and pseudogap in these Fe-based materials.
Keywords
Cite
@article{arxiv.0806.0291,
title = {Common Features in Electronic Structure of the Fe-Based Layered Superconductors from Photoemission Spectroscopy},
author = {Xiaowen Jia and Haiyun Liu and Wentao Zhang and Lin Zhao and Jianqiao Meng and Guodong Liu and Xiaoli Dong and G. F. Chen and J. L. Luo and N. L. Wang and Z. A. Ren and Wei Yi and Jie Yang and Wei Lu and G. C. Che and G. Wu and R. H. Liu and X. H. Chen and Guiling Wang and Yong Zhou and Yong Zhu and Xiaoyang Wang and Zhongxian Zhao and Zuyan Xu and Chuangtian Chen and X. J. Zhou},
journal= {arXiv preprint arXiv:0806.0291},
year = {2009}
}
Comments
5 pages,4 figures