Auger transition from orbitally degenerate systems: Effects of screening and multielectron excitations

Details Auger transition from orbitally degenerate systems: Effects of screening and multielectron excitations Auger transition from orbitally degenerate systems: Effects of screening and multielectron excitations

1998-07-14

arxiv.org/abs/cond-mat/9807192v1

Physics

Condensed Matter

Strongly Correlated Electrons

To appear in Phy. Rev. Lett

Scientific paper

10.1103/PhysRevLett.81.1658

We calculate Auger spectra given by the two-hole Green's function from orbitally degenerate Hubbard-like models as a function of correlation strength and band filling. The resulting spectra are qualitatively different from those obtained from fully-filled singly degenerate models due to the presence of screening dynamics and multielectron excitations. Application to a real system shows remarkable agreement with experimental results leading to reinterpretation of spectral features.

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