Abstract
The state of a 2D rectangular spin lattice with first, second and third nearest-neighbour anisotropic antiferromagnetic interactions is investigated. In a special line of parameter space, it is proved that the quantum spin liquid is the exact eigenstate of the system. For general parameter values, Green's function method with cut-off approximation is used to determine the phase diagram at zero temperature, and it is found that the quantum spin liquid appears on a rectangular lattice when the third nearest-neighbour interaction in the direction with shorter lattice spacing is introduced. The relations to the possibility of mixture of the spin liquid and the Fermi liquid in high-T c superconductors are discussed.
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Xiong, SJ. Quantum spin liquid on 2D rectangular frustrated AF lattice. Z. Physik B - Condensed Matter 86, 17–21 (1992). https://doi.org/10.1007/BF01323541
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DOI: https://doi.org/10.1007/BF01323541