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cond-mat1994
Quasiparticle Dispersion of the 2D Hubbard Model: From an Insulator to a Metal
R. Preuss, W. von der Linden, W. Hanke
On the basis of Quantum-Monte-Carlo results the evolution of the spectral weight of the two-dimensional Hubbard model is studied from insulating to metallic behavior…
cond-mat1994
Conserving approximation for the three-band Hubbard model: flat quasiparticle dispersion
R. Putz, R. Preuss, A. Muramatsu +1
It is shown that the low-energy single-particle excitation-spectrum of the three-band Hubbard model at hole-dopings away from half-filling agrees remarkably well with Quantum Monte…
cond-mat1994
Binding of Holes to Magnetic Impurities in a Strongly Correlated System
D. Poilblanc, D. J. Scalapino, W. Hanke
The effect of a magnetic (S=1/2) impurity coupled to a 2D system of correlated electrons (described by the t--J model) is studied by exact diagonalisations. It is found that, if th…