The Gap Function Phi(k,w) for a Two-leg t-J Ladder and the Pairing Interaction

Details The Gap Function Phi(k,w) for a Two-leg t-J Ladder and the Pairing Interaction The Gap Function Phi(k,w) for a Two-leg t-J Ladder and the Pairing Interaction

2004-12-08

arxiv.org/abs/cond-mat/0412186v1

Physical Review B 71 (2005) 174403

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

10.1103/PhysRevB.71.174403

The gap function phi(k,omega), determined from a Lanczos calculation for a doped 2-leg t-J ladder, is used to provide insight into the spatial and temporal structure of the pairing interaction. It implies that this interaction is a local near-neighbor coupling which is retarded. The onset frequency of the interaction is set by the energy of an S=1 magnon-hole-pair and it is spread out over a frequency region of order the bandwith.

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