Phase separation and pairing in coupled chains and planes

Details Phase separation and pairing in coupled chains and planes Phase separation and pairing in coupled chains and planes

1993-08-20

arxiv.org/abs/cond-mat/9308028v2

Physics

Condensed Matter

13 pages + 3 figures, available upon request, LATEX, preprint ORNL/CCIP/93/12

Scientific paper

10.1103/PhysRevB.49.3629

A generalization of the $t-J$ model in a system of two coupled chains or planes is studied by numerical diagonalization of small clusters. In particular, the effect of density fluctuations between these one- or two-dimensional coupled layerson intralayer phase separation and pairing is analyzed. The most robust signals of superconductivity are found at quarter filling for couplings just before the fully interlayer phase separated regime. The possibility of an enhancement of the intralayer superconducting pairing correlations by the interlayer couplings is investigated.

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