Magnetization plateaux in a generalised ladder model

Details Magnetization plateaux in a generalised ladder model Magnetization plateaux in a generalised ladder model

2002-05-17

arxiv.org/abs/cond-mat/0205364v1

Physics

Condensed Matter

latex, 10 pages, To be published as Proceedings of StatPhys - Kolkata IV in Physica A

Scientific paper

A spin-1/2 antiferromagnetic(AFM) generalised ladder model is constructed which consists of four-spin plaquettes, coupled through weaker exchange interactions, to two-spin rungs. In an extended parameter regime, the exact ground state of the ladder is determined. In this state, the four-spin plaquettes and the rungs are in their ground state spin configurations. In the presence of an external magnetic field, the magnetization/site has a plateau structure as a function of the magnetic field.

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