Ferromagnetic Pairing States on Two-Coupled Chains

Details Ferromagnetic Pairing States on Two-Coupled Chains Ferromagnetic Pairing States on Two-Coupled Chains

2008-03-03

arxiv.org/abs/0803.0174v2

Physics

Condensed Matter

Superconductivity

17 pages, 3 figures;in Version 2, a few remarks are added in section 4, and typos are fixed

Scientific paper

10.1088/1751-8113/41/36/365208

We propose a concrete model which exhibits ferromagnetism and electron-pair condensation simultaneously. The model is defined on two chains and consists of the electron hopping term, the on-site Coulomb repulsion, and a ferromagnetic interaction which describes ferromagnetic coupling between two electrons, one on a bond in a chain and the other on a site in the other chain. It is rigorously shown that the model has fullypolarized ferromagnetic pairing ground states. The higher dimensional version of the model is also presented.

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