Pseudogap due to antiferromagnetic fluctuations and the phase diagram of the high temperature oxide superconductors

Details Pseudogap due to antiferromagnetic fluctuations and the phase diagram of the high temperature oxide superconductors Pseudogap due to antiferromagnetic fluctuations and the phase diagram of the high temperature oxide superconductors

1999-10-22

arxiv.org/abs/cond-mat/9910349v4

J.Phys.Soc.Jpn. Vol.69, No.6 (2000) pp.1598-1601.

Physics

Condensed Matter

Superconductivity

4 pages (Latex with revtex.sty, epsf.sty), 4 figures. J. Phys. Soc. Jpn. Vol.69, No.6, in press

Scientific paper

10.1143/JPSJ.69.1598

A reduction of the density of states near the Fermi energy in the normal state (pseudogap) of high-temperature oxide superconductors is examined on the basis of the two-dimensional tight-binding model with effective interactions due to antiferromagnetic fluctuations. By using antiferromagnetic correlation lengths which are phenomenologically assumed, the doping dependence of the pseudogap is obtained. The superconducting transition temperature decreases and eventually vanishes due to the pseudogap as the hole concentration is reduced.

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