1998/12/31 by A. E. Trumper, Adolfo E. Trumper · 3 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Organic and Molecular Conductors Research #Physics of Superconductivity and Magnetism #cond-mat.stat-mech
paper · pdf · doi:10.1103/physrevb.60.2987
published as Phys. Rev. B60, 2987 (1999) · Revised version, 4 pages, Latex (twocolumn), 4 figures as eps files. To appear in PRB
arxiv created 1999/05/07 · openalex publication_date 1999/08/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We study the phase diagram at T=0 of the antiferromagnetic Heisenberg model on the triangular lattice with spatially anisotropic interactions. For values of the anisotropy very close to J_\ensuremathα/J_\ensuremathβ=0.5, conventional spin-wave theory predicts that quantum fluctuations melt the classical structures, for S=1/2. For the regime J_\ensuremathβ<J_\ensuremathα, it is shown that the incommensurate spiral phases survive until J_\ensuremathβ/J_\ensuremathα=0.27, leaving a wide region where the ground state is disordered. The existence of such nonmagnetic states suggests the possibility of spin-liquid behavior for intermediate values of the anisotropy.