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Magnetization plateaus of an exactly solvable spin-1 Ising-Heisenberg diamond chain

Research paper by Nerses Ananikian, Jozef Strecka, Vahan Hovhannisyan

Indexed on: 04 Jun '14Published on: 04 Jun '14Published in: Physics - Statistical Mechanics



Abstract

The spin-1 Ising-Heisenberg diamond chain in a magnetic field is exactly solved by a rigorous treatment based on the transfer-matrix method. An exact ground-state phase diagram includes in total three unconventional quantum ground states with a quantum entanglement of the decorating spin-1 Heisenberg dimers apart from two ground states with a classical spin arrangement. It is evidenced that all three values of the magnetization allowed for the spin-1 diamond chain without translationally broken symmetry by the Oshikawa-Yamanaka-Affleck criterion can become evident in an outstanding stepwise magnetization curve with three intermediate plateaus at zero, one-third, and two-thirds of the saturation magnetization.