Stripe Stability in the Extended t-J Model on Planes and Four-Leg Ladders

Abstract

The tendencies to phase-separation and stripe formation of the t-J model on planes and four-leg ladders have been here reexamined including hole hopping terms t&#39;, t&#39;&#39; beyond nearest-neighbor sites. The motivation for this study is the growing evidence that such terms are needed for a quantitative description of the cuprates. Using a variety of computational techniques it is concluded that the stripe tendencies considerably weaken when experimentally realistic t&#39;<0, t&#39;&#39;>0 for hole-doped cuprates are considered. However, a small t&#39;>0 actually enhances the stripe formation.