Photoemission and bremsstrahlung isochromat spectra of U{sub 3}P{sub 4} and U{sub 3}As{sub 4}

Journal Article · Wed Nov 15 04:00:00 EST 1995 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.52.14431· OSTI ID:130721

Suga, S; Matsubara, H ^[1]; Ishii, T ^[2]; Ochiai, A; Suzuki, T; Kasuya, T ^[3]

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1. Department of Material Physics, Faculty of Engineering Science, Osaka University, Toyonaka, Osaka 560 (Japan)
2. Institute for Solid State Physics, The University of Tokyo, Minatoku, Tokyo 106 (Japan)
3. Department of Physics, Tohoku University, Sendai, Miyagi 980 (Japan)

The electronic structures of U{sub 3}P{sub 4} and U{sub 3}As{sub 4} single crystals are probed by x-ray and vacuum ultraviolet photoemission spectroscopy (XPS and UPS) as well as by x-ray bremsstrahlung isochromat spectroscopy (BIS). The BIS spectra show a broad peak at {similar_to}1.8 eV above the Fermi level ({ital E}{sub {ital F}}) with a noticeable tail. Its energy separation of {similar_to}2.5 eV from the U 5{ital f} UPS peak is larger than U{sub 5{ital f},5{ital f}}=1.2 eV. This difference is interpreted as mostly due to the spin-orbit splitting of the U 5{ital f} state. The U 4{ital f} core XPS has shown rather an asymmetric shape with a tail toward larger binding energies ({ital E}{sub {ital B}}). A satellite not directly observable in the experimental spectrum is revealed at {similar_to}5.4 eV by deconvolution. Based on an extended Anderson impurity model, it is interpreted as the ``{ital p}-{ital d} antibonding state.`` The appreciable density of the U 6{ital d} state near {ital E}{sub {ital F}} strongly influences the photoemission spectra.

• OSTI ID: 130721
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 20 Vol. 52; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BREMSSTRAHLUNG
ELECTRONIC STRUCTURE
ENERGY-LEVEL DENSITY
F STATES
FERMI LEVEL
L-S COUPLING
MONOCRYSTALS
PHOTOEMISSION
URANIUM ARSENIDES
URANIUM PHOSPHIDES