Magnetization Plateaus in a Solvable 3-Leg Spin Ladder

Details Magnetization Plateaus in a Solvable 3-Leg Spin Ladder Magnetization Plateaus in a Solvable 3-Leg Spin Ladder

1999-12-13

arxiv.org/abs/cond-mat/9912205v2

Phys. Rev. B62, R3584

Physics

Condensed Matter

Statistical Mechanics

4 pages, revtex, 3 postscript figures, small changes to the text and references updated

Scientific paper

10.1103/PhysRevB.62.R3584

We present a solvable ladder model which displays magnetization plateaus at fractional values of the total magnetization. Plateau signatures are also shown to exist along special lines. The model has isotropic Heisenberg interactions with additional many-body terms. The phase diagram can be calculated exactly for all values of the rung coupling and the magnetic field. We also derive the anomalous behaviour of the susceptibility near the plateau boundaries. There is good agreement with the phase diagram obtained recently for the pure Heisenberg ladders by numerical and perturbative techniques.

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