Pair breaking by impurities in the two-dimensional t-J model
J. Riera, S. Koval, D. Poilblanc, F. Pantigny
TL;DR
This study investigates how impurities affect electron pairing in a 2D t-J model, revealing that non-magnetic impurities more effectively suppress pairing than magnetic ones, aligning with experimental observations in high-temperature superconductors.
Contribution
It provides a detailed analysis of impurity effects on pairing mechanisms using exact diagonalization, highlighting the differential impact of magnetic and non-magnetic impurities.
Findings
Non-magnetic impurities suppress pairing more effectively.
Results agree with experimental studies of Zn- and Ni- substituted superconductors.
Impurity type influences pairing suppression in the t-J model.
Abstract
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.
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