Electronic Resource
[S.l.]
:
American Institute of Physics (AIP)
Journal of Applied Physics
63 (1988), S. 3695-3695
ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
The joint photoemission and inverse photoemission spectra should yield the density of states for removing or adding an electron to the system. In the heavy fermion systems there is a large discrepancy between the experimentally measured density of states and the density of states obtained from local density functional band structure calculations. This discrepancy is clearly indicative of manybody effects. Arko and collaborators1 have recently discovered that similar manybody anomalies can be found in the narrow-band uranium systems. In a systematic series of studies on uranium compounds and alloys, it was observed that for the systems in which the f bands are expected to be more localized, the one-electron spectra were found to be broader. We have performed calculations using an N-fold degenerate Hubbard model, utilizing an expansion in the Coulomb interaction. The infinite set of diagrams containing independent single loops have been evaluated. This approximation should be exact in the limit N→∞. We obtain a qualitative agreement with the experimental findings.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.340689
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