Absence of long-range order in a spin-half Heisenberg antiferromagnet on the stacked kagome lattice

Details Absence of long-range order in a spin-half Heisenberg antiferromagnet on the stacked kagome lattice Absence of long-range order in a spin-half Heisenberg antiferromagnet on the stacked kagome lattice

2004-06-07

arxiv.org/abs/cond-mat/0406162v2

Physical Review B 70, 184412 (2004)

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

10.1103/PhysRevB.70.184412

We study the ground state of a spin-half Heisenberg antiferromagnet on the stacked kagome lattice by using a spin-rotation-invariant Green's-function method. Since the pure two-dimensional kagome antiferromagnet is most likely a magnetically disordered quantum spin liquid, we investigate the question whether the coupling of kagome layers in a stacked three-dimensional system may lead to a magnetically ordered ground state. We present spin-spin correlation functions and correlation lengths. For comparison we apply also linear spin wave theory. Our results provide strong evidence that the system remains short-range ordered independent of the sign and the strength of the interlayer coupling.

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