Magnetization of coupled spin clusters in Ladder Geometry

Abstract

In this paper, we construct a class of spin-1/2 antiferromagnetic (AFM) two-chain ladder models consisting of blocks of n-spin tetrahedral clusters alternating with two-spin rungs. For n=4 and 6 and in extended parameter regimes, the exact ground state of the ladder is shown to be a product of the ground states of the rungs and the n-spin blocks, in both zero and finite magnetic fields. In the latter case, magnetization/site (m) versus magenetic field (h) plot exhibits well-defined magnetization plateaus.

9 pages, latex, 6 figures, To be published in Phys. Rev. B

References in corpus (1)

• Infinite series of magnetization plateaus in the frustrated dimer-plaquette chain

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