Bound electron pairs in strongly correlated models of high-temperature superconductivity

Date

1998

Authors

Boyaci, H.
Kulik, I. O.

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Abstract

The ground-state energy of two electrons on a ring is calculated for the one-dimensional Hubbard model with positive and negative on-site interaction and for the contraction model with additive and multiplicative interaction terms. The hc/2e periodicity of the ground-state energy with respect to a flux Φ threading the loop is derived. The periodicity may serve as an indication of superconductivity. The results are shown to be consistent with the Lieb-Wu solution for Φ=0 limit. In addition, the new states that were missing in the Lieb-Wu solution are derived.

Source Title

Fizika Nizkikh Temperatur (Kharkov)

Publisher

Natsional'na Akademiya Nauk Ukrainy

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Citation

Published Version (Please cite this version)

Language

English