Abstract
We study the quasi-one-dimensional limit of the spin-1/2 quantum Heisenberg antiferromagnet on the kagome lattice. The lattice is divided into antiferromagnetic spin chains (exchange ) that are weakly coupled via intermediate “dangling” spins (exchange ). Using one-dimensional bosonization, renormalization-group methods, and current algebra techniques, the ground state is determined in the limit . We find that the dangling spins and chain spins form a spiral with and static moments, respectively, atop of which the chain spins exhibit a smaller antiferromagnetically ordered component along the axis perpendicular to the spiral plane.
- Received 22 July 2008
DOI:https://doi.org/10.1103/PhysRevB.78.174420
©2008 American Physical Society