Phase diagrams of spin ladders with ferromagnetic legs

Abstract

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 state phase diagram of the model is obtained for a wide range of coupling constants and several unconventional gapless ''spin-liquid'' phases are shown to exist for ferromagnetic coupling. The behavior of the ladder system in the vicinity of the ferromagnetic instability point is discussed in detail.

11 pages, 4 figures

References in corpus (2)

• Perturbation theories for the S=1/2 spin ladder with four-spin ring exchange
• String order in spin liquid phases of spin ladders

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