Journal
PHYSICAL REVIEW B
Volume 67, Issue 21, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.67.212402
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We present an exact diagonalization study of the ground state of the spin-half J(1)-J(2) model. Dimer correlation functions and the susceptibility associated to the breaking of the translational invariance are calculated for the 4x4 and the 6x6 clusters. These results-especially when compared to the one-dimensional case, where the occurrence of a dimerized phase for large enough frustration is well established-suggest either a homogeneous spin liquid or, possibly, a dimerized state with a rather small order parameter.
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