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cond-mat.str-el2002
On-Site Repulsion as the Source of Pairing in Carbon Nanotubes and Intercalated Graphite
Enrico Perfetto, Gianluca Stefanucci, Michele Cini
We show that different non-conventional superconductors have one fundamental feature in common: pair eigenstates of the Hamiltonian are repulsion-free, the W=0 pairs. In extended H…
cond-mat.str-el2002
Antiferromagnetism in the Exact Ground State of the Half Filled Hubbard Model on the Complete-Bipartite Graph
Gianluca Stefanucci, Michele Cini
As a prototype model of antiferromagnetism, we propose a repulsive Hubbard Hamiltonian defined on a graph with and bonds…