Charge and Phase Fluctuations in Attractive Hubbard Model

Details Charge and Phase Fluctuations in Attractive Hubbard Model Charge and Phase Fluctuations in Attractive Hubbard Model

2002-12-14

arxiv.org/abs/cond-mat/0212337v1

Physics

Condensed Matter

Superconductivity

4 pages, 2 figures, Physica C (accepted)

Scientific paper

10.1016/S0921-4534(03)00648-8

Using the negative U Hubbard model we analyze normal state properties of a superconductor. In this model there exists a characteristic pairing temperature T_P above a superconducting critical temperature. Below T_P electrons start to form incoherent pairs. The fluctuations in charge and phase are precursors of charge density wave and superconductivity phases depending on band filling. They lead naturally to pseudogap opening in the density of states.

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