Ground-state properties of the triangular-lattice Heisenberg antiferromagnet with arbitrary spin quantum number s
نویسندگان
چکیده
We apply the coupled cluster method to high orders of approximation and exact diagonalizations to study the ground-state properties of the triangular-lattice spin-s Heisenberg antiferromagnet. We calculate the fundamental ground-state quantities, namely, the energy e0, the sublattice magnetization Msub, the in-plane spin stiffness ρs and the in-plane magnetic susceptibility χ for spin quantum numbers s = 1/2, 1, . . . , smax, where smax = 9/2 for e0 and Msub, smax = 4 for ρs and smax = 3 for χ. We use the data for s ≥ 3/2 to estimate the leading quantum corrections to the classical values of e0, Msub, ρs, and χ. In addition, we study the magnetization process, the width of the 1/3 plateau as well as the sublattice magnetizations in the plateau state as a function of the spin quantum number s.
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