Electronic structure analysis of UIr using soft x-ray photoemission spectroscopy and band calculation

Uranium ferromagnet UIr is well-known to a pressure-induced superconductor without an inversion symmetry. In order to clarify the U 5f states of ferromagnetically-ordered UIr below Tc ~ 46 K and at ambient pressure, we observed 5f-sensitive soft X-ray photoemission spectra (SXPES), and calculated th...

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Bibliographic Details
Published in:Journal of physics. Conference series 2010-01, Vol.200 (1), p.012229
Main Authors: Yamagami, H, Ohkochi, T, Fujimori, S-i, Toshimitsu, T, Yasui, A, Okane, T, Saitoh, Y, Fujimori, A, Haga, Y, Yamamoto, E, Ikeda, S, Onuki, Y
Format: Article
Language:English
Subjects:
Band structure of solids
Electronic structure
Ferromagnetism
Photoelectric emission
Physics
Pressure
Soft x rays
Spectrum analysis
Structural analysis
Temperature dependence
Uranium
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Summary:Uranium ferromagnet UIr is well-known to a pressure-induced superconductor without an inversion symmetry. In order to clarify the U 5f states of ferromagnetically-ordered UIr below Tc ~ 46 K and at ambient pressure, we observed 5f-sensitive soft X-ray photoemission spectra (SXPES), and calculated the band structure by a relativistic LAPW method in a local-spin density approximation. The temperature-dependent angle-integrated SXPES near the Fermi energy show a definite energy-shift of the band structures below and above Tc. The exchange splitting of the 5f bands seems to be consistent with an itinerant band picture like Stoner model. Furthermore the angle-resolved SXPES are compared with the theoretical band structure to investigate the relationship between the band shift and the magnetism.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/200/1/012229