Eur. Phys. J. B 79, 169-175 (2011)
https://doi.org/10.1140/epjb/e2010-10913-2

Insulating phases of the one-dimensional t-J model with nearest-neighbor repulsive interaction

¹ Department of Applied Physics, Xi'an Jiaotong University, Xi'an, 710049, P.R. China
² School of Physics, Xinjiang University, Urumqi, 830046, P.R. China

Corresponding author: ^a dinghanqinxjdx@163.com

Received: 23 November 2010
Published online: 14 January 2011

Abstract

Using the deformed Hubbard operator approach, we analytically study weak-coupling phase diagram of the one-dimensional t-J-V model at half filling. In the case of small deformed parameter ζ(≪1), the interactions induced by the no double occupancy constraint are softened, accessible by the bosonization field theory and the renormalization group technique. The ground state exhibits insulating behavior of density-wave correlations. The bond-spin-density-wave (BSDW) and bond-charge-density-wave (BCDW) phases are realized in the whole weak-coupling regime while the charge-density-wave (CDW) and spin-density-wave (SDW) phases depend on V/J > (V/J)_c or V/J < (V/J)_c, where (V/J)_c = 1/4. Furthermore, our results are expected to adiabatically continue back to ζ = 1.