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cond-mat.str-el2008★ 12 cited
Antiferromagnetic ordering of energy levels for spin ladder with four-spin cyclic exchange: Generalization of the Lieb-Mattis theorem
Tigran Hakobyan
The Lieb-Mattis theorem is generalized to an antiferromagnetic spin-ladder model with four-spin cyclic exchange interaction. We prove that for J>2K, the antiferromagnetic ordering…
cond-mat.str-el2007★ 8 cited
Energy-level ordering and ground-state quantum numbers for frustrated two-leg spin-1/2 ladder model
Tigran Hakobyan
The Lieb-Mattis theorem about antiferromagnetic ordering of energy levels on bipartite lattices is generalized to finite-size two-leg spin-1/2 ladder model frustrated by diagonal i…
cond-mat.str-el2004★ 13 cited
The ordering of energy levels for SU(n) symmetric antiferromagnetic chains
Tigran Hakobyan
The SU(n) symmetric antiferromagnetic finite chain with the fundamental representation and nearest-neighbor interaction is studied. A partial ordering between the lowest energy lev…