Singlet Stripe Phases in the planar t-J Model

Tsunetsugu, Hirokazu; Troyer, Matthias; Rice, T. M.

Singlet Stripe Phases in the planar t-J Model

Authors

Tsunetsugu, Hirokazu

Troyer, Matthias

Rice, T. M.

Description

The energies of singlet stripe phases in which a plane is broken up into spin liquid ladders by lines of holes, is examined. If the holes were static then patterns containing spin liquids with a finite spin gap are favored. The case of dynamic holes is treated by assembling t-J ladders oriented perpendicular to the stripes. For a wide region around $J/t \approx 1$ the hole-hole correlations in a single ladder are found to be predominantly charge density wave type but an attraction between hole pairs on adjacent ladders leads to a stripe phase. A quantum mechanical melting of the hole lines at smaller $J/t$ values leads to a Bose condensate of hole pairs, i.e. a superconducting phase.
5 pages, uuencoded compressed PostScript file including 5 figures, ETH-TH/9423