Abstract
The electronic structure of URu 2Si 2, URh 2Si 2 and UPd 2Si 2 is determined by means of selfconsistent density-functional calculations in the local approximation treating the U 5f states as band states. A pronounced trend in the hybridization strength is exposed and is claimed to give rise to the different magnetic properties of these compounds. Thus we found that strong hybridization of the U 5f and Ru 4d states causes URu 2Si 2 to be very close to a nonmagnetic-magnetic instability. The densities of states are calculated and are seen to compare well with results of photoemission experiments.
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