Effect of 3d-doping on the electronic structure of BaFe2As2

Details Effect of 3d-doping on the electronic structure of BaFe2As2 Effect of 3d-doping on the electronic structure of BaFe2As2

2012-04-11

arxiv.org/abs/1204.2563v1

J. Phys.: Condens. Matter, 24 215501 (2012)

Physics

Condensed Matter

Materials Science

18 pages, 8 figures

Scientific paper

10.1088/0953-8984/24/21/215501

The electronic structure of BaFe2As2 doped with Co, Ni, and Cu has been studied by a variety of experimental and theoretical methods, but a clear picture of the dopant 3d states has not yet emerged. Herein we provide experimental evidence of the distribution of Co, Ni, and Cu 3d states in the valence band. We conclude that the Co and Ni 3d states provide additional free carriers to the Fermi level, while the Cu 3d states are found at the bottom of the valence band in a localized 3d10 shell. These findings help shed light on why superconductivity can occur in BaFe2As2 doped with Co and Ni but not Cu.

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