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25 April 2024

» arxiv » 0806.0291

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Common Features in Electronic Structure of the Fe-Based Layered Superconductors from Photoemission Spectroscopy
Xiaowen Jia ; Haiyun Liu ; Wentao Zhang ; Lin Zhao ; Jianqiao Meng ; Guodong Liu ; Xiaoli Dong ; G. F. Chen ; J. L. Luo ; N. L. Wang ; Z. A. Ren ; Wei Yi ; Jie Yang ; Wei Lu ; G. C. Che ; G. Wu ; R. H. Liu ; X. H. Chen ; Guiling Wang ; Yong Zhou ; Yong Zhu ; Xiaoyang Wang ; Zhongxian Zhao ; Zuyan Xu ; Chuangtian Chen ; X. J. Zhou ;
Date:	2 Jun 2008
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) com- pounds. 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.
Source:	arXiv, 0806.0291
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