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Charge density plateaux and insulating phases in the \(\mathsf{t-J}\) model with ladder geometry

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Abstract.

We discuss the occurrence and the stability of charge density plateaux in ladder-like t-J systems (at zero magnetization M = 0) for the cases of 2- and 3-leg ladders. Starting from isolated rungs at zero leg coupling, we study the behaviour of plateaux-related phase transitions by means of first order perturbation theory and compare our results with Lanczos diagonalizations for t-J ladders (N = 2 × 8) with increasing leg couplings. Furthermore we discuss the regimes of rung and leg couplings that should be favoured for the appearance of the charge density plateaux.

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Authors and Affiliations

  1. Physics Department, University of Wuppertal, 42097, Wuppertal, Germany

    A. Fledderjohann, A. Langari & K.-H. Mütter

  2. Institute for Advanced Studies in Basic Sciences, 45195-159, Zanjan, Iran

    A. Langari

Authors
  1. A. Fledderjohann
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  2. A. Langari
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  3. K.-H. Mütter
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Corresponding author

Correspondence to A. Fledderjohann.

Additional information

Received: 28 July 2003, Published online: 8 December 2003

PACS:

71.10.Fd Lattice fermion models (Hubbard model, etc.) - 71.27. + a Strongly correlated electron systems; heavy fermions - 75.10.-b General theory and models of magnetic ordering - 75.10.Jm Quantized spin models

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Fledderjohann, A., Langari, A. & Mütter, KH. Charge density plateaux and insulating phases in the \(\mathsf{t-J}\) model with ladder geometry. Eur. Phys. J. B 36, 193–202 (2003). https://doi.org/10.1140/epjb/e2003-00335-8

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  • DOI: https://doi.org/10.1140/epjb/e2003-00335-8

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