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Phys. Rev. B 59, R11649–R11652 (1999)

Stripe stability in the extended t-J model on planes and four-leg ladders

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T. Tohyama
Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan

C. Gazza
National High Magnetic Field Laboratory and Department of Physics, Florida State University, Tallahassee, Florida 32306

C. T. Shih
National Center for High-Performance Computing, Hsinchu, Taiwan

Y. C. Chen
Department of Physics, Tunghai University, Taichung, Taiwan

T. K. Lee
Institute of Physics, Academia Sinica, Nankang, Taipei, Taiwan

S. Maekawa
Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan

E. Dagotto
National High Magnetic Field Laboratory and Department of Physics, Florida State University, Tallahassee, Florida 32306

Received 30 September 1998; published in the issue dated 1 May 1999

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′,t″ 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′<0, t″>0 for hole-doped cuprates are considered. However, a small t′>0 actually enhances the stripe formation.

© 1999 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.59.R11649
DOI:
10.1103/PhysRevB.59.R11649
PACS:
74.20.Mn, 74.25.Dw
 
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