Magnetization Plateaus in a Solvable 3-Leg Spin Ladder

Abstract

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.

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

References in corpus (3)

• Magnetization plateaux and jumps in a class of frustrated ladders: A simple route to a complex behaviour
• Exactly solvable quantum spin tubes and ladders
• Phase diagram of the su(8) quantum spin tube

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