Realization of a Spin liquid in a Two Dimensional Quantum Antiferromagnet
A. Parola, S. Sorella, Q. F. Zhong
Abstract
The ground state properties of the two dimensional spatially anisotropic Heisenberg model are investigated by use of field theory mappings, spin-wave expansion and Lanczos technique. Evidence for a disorder transition induced by anisotropy at about Jy/Jx < 0.1 is shown. We argue that the disordered phase is gapless and its long wavelength properties can be interpreted in terms of decoupled one dimensional chains.
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