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.
Realization of a spin liquid in a two dimensional quantum antiferromagnet / Parola, A; Sorella, S; Zhong, Qf. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 71:26(1993), pp. 4393-4396. [10.1103/PhysRevLett.71.4393]
Realization of a spin liquid in a two dimensional quantum antiferromagnet
SORELLA S;
1993-01-01
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 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.File in questo prodotto:
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