The orbital characters of low-energy electronic structure in iron-chalcogenide superconductor K x Fe2−y Se2
作者： Fei Chen , QingQin Ge , Min Xu , Yan Zhang , XiaoPing Shen
DOI: 10.1007/S11434-012-5405-7
关键词:
摘要: The newly discovered iron-chalcogenide superconductor KxFe2−ySe2 exhibits a distinct electronic structure from other iron-based superconductors. Exploiting polarization-dependent angle-resolved photoemission spectroscopy, we have determined the orbital characters of band in superconductor. To large extent, find that shares similar with superconductors, but its own characteristics. For example, resolved two highly degenerate electron cylinders around zone corner s and p geometries, respectively, indicating negligible interactions between them. Moreover, contrast to calculation results, small pocket Z is found be mainly consisted dZ orbital. would help construct realistic model for KxFe2−ySe2.
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