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The orbital characters and kz dispersions of bands in iron-pnictide NaFeAs |
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| Authors: | C. He X.F. Wang F. Chen Z.R. Ye M. Arita K. Shimada H. Namatame M. Taniguchi X.H. Chen D.L. Feng |
| Affiliation: | a State Key Laboratory of Surface Physics, Department of Physics, and Advanced Materials Laboratory, Fudan University, Shanghai 200433, People's Republic of China b Department of Physics, University of Science and Technology of China, Hefei, Anhui 230027, People's Republic of China c Hiroshima Synchrotron Radiation Center, Hiroshima University, Hiroshima 739-8526, Japan d Graduate School of Science, Hiroshima University, Hiroshima 739-8526, Japan |
| Abstract: | The electronic structure and orbital characters of iron-pnictide NaFeAs have been studied by polarization dependent angle-resolved photoemission spectroscopy. Some of the bands are mixed with the orbitals of opposite symmetries, which could be interpreted by the hybridization among the bands. According to the photon energy dependent experiment, the kz dispersions of the bands that cross the Fermi energy are weak in both paramagnetic and spin density wave states. However, a band well below the Fermi level shows a kz dispersion of 41 meV, which mainly contains the dz2 orbital. |
| Keywords: | A. Superconductors C. Photoelectron spectroscopy D. Electronic structure |
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