Stability of the spiral phase in the 2D extended t-J model

Details Stability of the spiral phase in the 2D extended t-J model Stability of the spiral phase in the 2D extended t-J model

2004-07-09

arxiv.org/abs/cond-mat/0407242v1

Phys. Rev. B 70, 195105 (2004)

Physics

Condensed Matter

Strongly Correlated Electrons

7 pages, 6 figures

Scientific paper

10.1103/PhysRevB.70.195105

We analyze the t-t'-t''-J model at low doping by chiral perturbation theory and show that the (1,0) spiral state is stabilized by the presence of t',t'' above critical values around 0.2J, assuming t/J=3.1. We find that the (magnon mediated) hole-hole interactions have an important effect on the region of charge stability in the space of parameters t',t'', generally increasing stability, while the stability in the magnetic sector is guaranteed by the presence of spin quantum fluctuations (order from disorder effect). These conclusions are based on perturbative analysis performed up to two loops, with very good convergence.

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