PHASE-DIAGRAM OF THE 2-DIMENSIONAL T-J MODEL AT LOW DOPING

Note

关键词: DYNAMIC PROPERTIES;    EXACT-DIAGONALIZATION;    SPECTRAL-FUNCTION;    HOLE DYNAMICS;    ANTIFERROMAGNET;    SUPERCONDUCTIVITY;    FERROMAGNETISM;    STATE;   

DOI  :  10.1103/PhysRevB.52.9201

来源: SCIE

【 摘 要 】

The phase diagram of the planar t-J model at small hole doping is investigated by finite-size scaling of exact diagonalization data of root N x root N clusters (N less than or equal 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 greater than or similar to 0.2), a liquid of hole droplets (quartets) for larger J/t ratios (J/t greater than or similar to 0.5), and, at even larger coupling J/t, an instability towards phase separation.

【 授权许可】

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