Session L36 - General Poster Session II.
POSTER session, Wednesday morning, March 22
Exhibit Hall, MCC
Using the constrained-path Monte Carlo (CPMC) method, we have studied the one-dimensional d-p model for the cases with finite Coulomb repulsion on d sites, and mainly examined the effects of transfer energy t_pp between the nearest-neighbor p sites on pairing correlations with different symmetry. Of these pairing correlations, we observed that only the tail of singlet pairing between the nearest-neighbor p sites increases explicitly with the increase of t_pp, while others decrease or increase negligibly. But for all symmetries, the vertex contributions fluctuate around zero at large distance, therefore it is difficult to determine which pairing channel dominates when the critical exponent of the correlation functions K_\rho > 1.