Universal Sequence of the Ground States and Energy Level Ordering in Frustrated Antiferromagnetic Rings with a Single Bond Defect
M. Antkowiak, W. Florek and G. Kamieniarz
Adam Mickiewicz University in Poznań, Faculty of Physics, Umultowska 85, 61-614 Poznań, Poland
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The universal sequence of the ground states for antiferromagnetic frustrated rings with the odd number of the local spins s and a single bond defect α described by the isotropic Heisenberg Hamiltonian is discussed. The Lieb-Mattis energy level ordering in a pentanuclear ring is revealed and the arising magnetisation steps are demonstrated.

DOI: 10.12693/APhysPolA.131.890
PACS numbers: 75.10.Jm, 75.10.Hk, 75.50.Xx, 03.65.Aa