Preformed Pairs, SU(2) Slave-boson Theory, and High T_c Superconductors

Details Preformed Pairs, SU(2) Slave-boson Theory, and High T_c Superconductors Preformed Pairs, SU(2) Slave-boson Theory, and High T_c Superconductors

1998-11-11

arxiv.org/abs/cond-mat/9811146v1

Physics

Condensed Matter

Superconductivity

12 pages, RevTEX

Scientific paper

A preformed-pair model was considered. The quantum disordered phase of the d-wave superconducting state was obtained by turning on an on-site repulsion. The low energy effective theory of the quantum disordered phase was derived, which was found to be qualitatively equivalent to the low energy effective theory of the SU(2) slave-boson theory in the staggered-flux phase. Many physical properties of the disordered phase at low energies were obtained, such as the Mott insulator property at zero doping, spin gap and low superfluid density at low doping.

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