Phase diagram of the two-dimensionalt-Jmodel at low doping
- 1 October 1995
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 52 (13) , 9201-9204
- https://doi.org/10.1103/physrevb.52.9201
Abstract
The phase diagram of the planar t-J model at small hole doping is investigated by finite-size scaling of exact diagonalization data of √N × √N clusters (N≤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≳0.2), a liquid of hole droplets (quartets) for larger J/t ratios (J/t≳0.5), and, at even larger coupling J/t, an instability towards phase separation.Keywords
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