Frustrated spin-1/2 model in two dimensions with a known ground state

Bose, Indrani ; Mitra, Partha (1991) Frustrated spin-1/2 model in two dimensions with a known ground state Physical Review B, 44 (1). pp. 443-445. ISSN 0163-1829

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Official URL: http://prb.aps.org/abstract/PRB/v44/i1/p443_1

Related URL: http://dx.doi.org/10.1103/PhysRevB.44.443

Abstract

A frustrated spin-1/2 model is constructed on the square lattice, the Hamiltonian of which contains five types of interactions: nearest-neighbor (NN), diagonal (D), next-nearest-neighbor (NNN), knight's-move-distance away (KM), and further-neighbor diagonal (FND). The NN bonds in a particular direction, horizontal or vertical, are of alternating coupling strengths 7J and J. The other interaction strengths are: J (for NN and D), (J), J/2 (for NNN and KM), and J/4 (for FND). We prove that the exact ground state of the Hamiltonian is the columnar-dimer state.

Item Type:Article
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ID Code:5941
Deposited On:19 Oct 2010 10:07
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