Comment on "Kagome Lattice Antiferromagnet Stripped to Its Basics"

Abstract

Density matrix renormalization group (DMRG) calculations on large systems (up to 3096 spins) indicate that the ground state of the Heisenberg model on a 3-chain Kagome strip is spontaneously dimerized. This system has degenerate ground states and a gap to triplet and singlet excitations. These results are in direct contradiction with recent results of Azaria et al (Phys. Rev. Lett. 81, 1694 (1998)) and suggest a need for a reexamination of the underlying field theory.

1 page, submitted to PRL

References in corpus (3)

• First excitations of the spin 1/2 Heisenberg antiferromagnet on the kagomé lattice
• Kagom{é} Lattice Antiferromagnet Stripped to Its Basics
• Gapless Singlet modes in the Kagome strips: A study through DMRG and strong coupling analysis

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