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cond-mat.str-el2002★ 1 cited
Superconductivity and Instabilities in the t-t' Hubbard Model
F. Wegner, V. Hankevych
We present a stability analysis of the 2D t-t' Hubbard model on a square lattice for t' = -t/6. We find possible phases of the model (d-wave Pomeranchuk and superconducting states,…
physics.class-ph2002
Floating Bodies of Equilibrium II
Franz Wegner
In a previous paper (physics/0203061) ''Floating bodies of equilibrium I'' I have shown that there exist two-dimensional non-circular cross-sections of bodies of homogeneous densit…
physics.class-ph2002
Floating Bodies of Equilibrium I
Franz Wegner
A long cylindrical body of circular cross-section and homogeneous density may float in all orientations around the cylinder axis. It is shown that there are also bodies of non-circ…