%0 Journal Article
%A Liebsch, A.
%T Spectral weight of doping-induced states in the two-dimensional Hubbard model
%J Physical review / B
%V 81
%N 23
%@ 1098-0121
%C College Park, Md.
%I APS
%M PreJuSER-12050
%P 235133
%D 2010
%Z Record converted from VDB: 12.11.2012
%X The spectral weight of states induced in the Mott gap via hole doping in the two-dimensional Hubbard model is studied within cluster dynamical mean-field theory combined with finite-temperature exact diagonalization. If the cutoff energy is chosen to lie just below the upper Hubbard band, the integrated weight per spin is shown to satisfy W+(delta) >= delta (delta denotes the total number of holes), in agreement with model predictions by Eskes et al. [Phys. Rev. Lett. 67, 1035 (1991)]. However, if the cutoff energy is chosen to lie in the range of the pseudogap, W+(delta) remains much smaller than delta and approximately saturates near delta approximate to 0.2, ..., 0.3. The analysis of recent x-ray absorption spectroscopy data therefore depends crucially on the appropriate definition of the integration window.
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000279335400001
%R 10.1103/PhysRevB.81.235133
%U https://juser.fz-juelich.de/record/12050