The bulge in the basal plane area of cuprate superconductors - evidence for 3a singlet hole pairs

Abstract

The bulge in the doping dependence of the basal plane area in hole doped cuprate superconductors is connected with a non-double-occupancy constraint for the oxygen cages in the CuO_2 lattice. This constraint favors the formation of 3a hole pairs growing to filaments with gapless excitations along the (pi, pi) direction. Thus in the pseudogap regime a nodal metal of hole pairs is created. Densest packed 3a hole pairs stabilize the optimum doped state at n =1/6 ~ 0.16.

2 pages, 2 figures, submitted to Physica C (Proceedings of the M2S-HTSC-VIII Conference, Dresden, Germany)

Cited by in corpus (2)

• Giant electron-phonon anomaly in doped La2CuO4 and other cuprates
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