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cond-mat1993
The Energy-Energy Correlation Function of the Random Bond Ising Model in Two Dimensions
K. Ziegler
The energy-energy correlation function of the two-dimensional Ising model with weakly fluctuating random bonds is evaluated in the large scale limit. Two correlation lengths exist…
cond-mat1993
Stability of Insulating Phases in the Hubbard Model: a Cluster Expansion
K. Ziegler
The stability of the insulating regime of the Hubbard model on a -dimensional lattice, which is characterized by an exponential decay of the Green's functions, is investigated i…