Intrinsic Correlated Electronic Structure of CrO2 Revealed by Hard X-ray Photoemission Spectroscopy
| Autor: | Sperlich, M., König, C., Güntherodt, G., Sekiyama, A., Funabashi, G., Tsunekawa, M., Imada, S., Shigemoto, A., Okada, K., Higashiya, A., Yabashi, M., Tamasaku, K., Ishikawa, T., Renken, V., Allmers, T., Donath, M., Suga, S. |
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| Rok vydání: | 2013 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.87.235138 |
| Popis: | Bulk-sensitive hard x-ray photoemission spectroscopy (HAXPES) reveals for as-grown epitaxial films of half-metallic ferromagnetic CrO2(100) a pronounced screening feature in the Cr 2p3/2 core level and an asymmetry in the O 1s core level. This gives evidence of a finite, metal-type Fermi edge, which is surprisingly not observed in HAXPES. A spectral weight shift in HAXPES away from the Fermi energy is attributed to single-ion recoil effects due to high energy photoelectrons. In conjunction with inverse PES the intrinsic correlated Mott-Hubbard-type electronic structure is unravelled, yielding an averaged Coulomb correlation energy Uav ~ 3.2 eV. Comment: Manuscript 12 pages, 4 figures; Supplemental material 7 pages, 5 figures |
| Databáze: | arXiv |
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