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cond-mat.str-el2002★ 49 cited
Phase diagrams of spin ladders with ferromagnetic legs
T. Vekua, G. I. Japaridze, H. -J. Mikeska
The low-temperature properties of the spin S=1/2 ladder with anisotropic ferromagnetic legs are studied using the continuum limit bosonization approach. The weak-coupling ground st…
cond-mat.str-el2002★ 57 cited
Perturbation theories for the S=1/2 spin ladder with four-spin ring exchange
M. Mueller, T. Vekua, H. -J. Mikeska
The isotropic S=1/2 antiferromagnetic spin ladder with additional four-spin ring exchange is studied perturbatively in the strong coupling regime with the help of cluster expansion…