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Pair breaking by impurities in the two-dimensional t-J model
Pair breaking mechanisms by impurities are investigated in the
two-dimensional t-J model by exact diagonalization techniques. Analysis of
binding energies, pairing correlations, dynamical spin and pair
susceptibilities shows that non-magnetic impurities are more effective in
suppressing pairing than magnetic ones in agreement with experimental studies
of Zn- and Ni- substituted High-Tc superconductors.Comment: 4 pages, Revtex v3.0, 4 figures uuencoded, ask for hardcopies at
[email protected] A missleading statement in the introduction was correcte