On temperature versus doping phase diagram of high critiical temperature superconductors

Details On temperature versus doping phase diagram of high critiical temperature superconductors On temperature versus doping phase diagram of high critiical temperature superconductors

1998-03-02

arxiv.org/abs/cond-mat/9803011v1

Physics

Condensed Matter

Superconductivity

15 pages, 3 figures, EMTEX

Scientific paper

The attempt to describe the bell-shape dependence of the critical temperature of high-$T_{c}$ superconductors on charge carriers density is made. Its linear increase in the region of small densities (underdoped regime) is proposed to explain by the role of the order parameter phase 2D fluctuations which become less at this density growth. The critical temperature suppression in the region of large carrier densities (overdoped regime) is connected with the appearance (because of doping) of the essential damping of long-wave bosons which in the frame of the model proposed define the mechanism of indirect inter-fermion attraction.

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