Phase diagrams of spin ladders with ferromagnetic legs

Details Phase diagrams of spin ladders with ferromagnetic legs Phase diagrams of spin ladders with ferromagnetic legs

2002-09-30

arxiv.org/abs/cond-mat/0209677v1

Phys. Rev. B 67, 064419 (2003)

Physics

Condensed Matter

Strongly Correlated Electrons

11 pages, 4 figures

Scientific paper

10.1103/PhysRevB.67.064419

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.

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