Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2010-07-16
Journal of Physics and Chemistry of Solids 72 (2011) 465--468
Physics
Condensed Matter
Strongly Correlated Electrons
4 pages, 5 figures. Proceeding of the 9th International Conference on Spectroscopies in Novel Superconductors (SNS2010)
Scientific paper
10.1016/j.jpcs.2010.10.064
We have performed an angle-resolved photoemission study of the iron pnictide superconductor KFe2As2 with Tc 4 K. Most of the observed Fermi surfaces show almost two-dimensional shapes, while one of the quasi-particle bands near the Fermi level has a strong dispersion along the kz direction, consistent with the result of a band-structure calculation. However, hole Fermi surfaces \alpha and \zeta are smaller than those predicted by the calculation while other Fermi surfaces are larger. These observations are consistent with the result of a de Haas-van Alphen study and a theoretical prediction on inter-band scattering, possibly indicating many body effects on the electronic structure.
Eisaki Hiroshi
Fujimori Atsushi
Harima Hisatomo
Iyo Akira
Kihou Kunihiro
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