Appearance of correlation effects in U intermetallics

Sarma, D. D. ; Hillebrecht, F. U. ; Speier, W. ; Mårtensson, N. ; Koelling, D. D. (1986) Appearance of correlation effects in U intermetallics Physical Review Letters, 57 (17). pp. 2215-2218. ISSN 0031-9007

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Experimental densities of states of USi3 and UIr3 obtained by x-ray photoelectron spectroscopy and bremsstrahlung isochromat spectroscopy (BIS) are compared to fully relativistic self-consistent band-structure calculations. Very good agreement is found for USi3, whereas the unoccupied states of UIr3 exhibit a satellite which cannot be explained by the one-particle calculation. The satellite in BIS of UIr3 is attributed to a quasiparticle bound state, and is qualitatively reproduced by a Hubbard model including Coulomb correlation within the narrow 5f band. The importance of our findings with reference to the magnetic properties of U intermetallics as well as pure U metal is discussed.

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Deposited On:04 Jul 2011 06:44
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