Realization of a Spin liquid in a Two Dimensional Quantum Antiferromagnet

Details Realization of a Spin liquid in a Two Dimensional Quantum Antiferromagnet Realization of a Spin liquid in a Two Dimensional Quantum Antiferromagnet

1993-08-03

arxiv.org/abs/cond-mat/9308002v1

Physics

Condensed Matter

10 pages + 5 pictures appended, RevTex 3.0, SISSA 128/93/CM/MB

Scientific paper

10.1103/PhysRevLett.71.4393

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 $J_y/J_x < 0.1$ 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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