Phase diagram of the two-dimensionalt-Jmodel at low doping

1995/05/02 by Didier Poilblanc, D. Poilblanc · 4 citations
Physics and Astronomy · #Magnetic confinement fusion research #Physics of Superconductivity and Magnetism #Theoretical and Computational Physics #cond-mat

paper · pdf · doi:10.1103/physrevb.52.9201

3 pages, latex, 5 postscript figures, uuencoded

arxiv created 1995/05/02 · openalex publication_date 1995/10/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

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 \ensuremath\surdN \ifmmode×\else\texttimes\fi \ensuremath\surdN clusters (N\ensuremath≤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\ensuremath\gtrsim0.2), a liquid of hole droplets (quartets) for larger J/t ratios (J/t\ensuremath\gtrsim0.5), and, at even larger coupling J/t, an instability towards phase separation.

Citations

• Indications of d_{x² - y²} Superconductivity in the Two Dimensional t-J Model

Cited by

• Doped singlet-pair crystal in the Hubbard model on the checkerboard lattice
• Coexistence ofdx2−y2-wave superconductivity and antiferromagnetism induced by a staggered field
• Phase separation and three-site hopping in the two-dimensional t-J model
• Phase separation int−Jladders