Charge density plateaux and insulating phases in the $t-J$ model with ladder geometry

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 ($N=2\times 8$) 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.

10 pages, 7 figures, RevTex4

References in corpus (2)

• Friedel Oscillations and Charge Density Waves in Chains and Ladders
• Bond operator theory of doped antiferromagnets: from Mott insulators with bond-centered charge order, to superconductors with nodal fermions

Cited by in corpus (1)

• Formation of clusters in the ground state of the $t-J$ model on a two leg ladder