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Phase diagram of the two-dimensional t--J model at low doping

D. Poilblanc
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Abstract

The phase diagram of the planar t--J model at small hole doping is investigated by finite size scaling of exact diagonalisation data of NXN clusters (up to 26). Hole-droplet binding energies, compressibility and static spin and charge correlations are calculated. Short range antiferromagnetic correlations can produce attractive forces between holes leading to a very rich phase diagram including a liquid of d-wave hole pairs (for $J/t\gtrsim 0.2$), a liquid of hole droplets (quartets) for larger J/t ratios ($J/t\gtrsim 0.5$) and, at even larger coupling J/t, an instability towards phase separation.

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D. Poilblanc. 1995-05-02. Phase diagram of the two-dimensional t--J model at low doping. https://doi.org/10.1103/physrevb.52.9201

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