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Topological Confinement and Superconductivity

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arxiv 0808.3735 v1 pith:ISKGGPBH submitted 2008-08-27 cond-mat.str-el cond-mat.supr-con

Topological Confinement and Superconductivity

K. A. Al-Hassanieh , C. D. Batista , P. Sengupta , A. E. Feiguin This is my paper
classification cond-mat.str-el cond-mat.supr-con
keywords mechanismconfinementmodeltopologicalallowsantiferromagnetismbandconduction
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We derive a Kondo Lattice model with a correlated conduction band from a two-band Hubbard Hamiltonian. This mapping allows us to describe the emergence of a robust pairing mechanism in a model that only contains repulsive interactions. The mechanism is due to topological confinement and results from the interplay between antiferromagnetism and delocalization. By using Density-Matrix-Renormalization-Group (DMRG), we demonstrate that this mechanism leads to dominant superconducting correlations in a 1D-system.

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