Comment on "Kagome Lattice Antiferromagnet Stripped to Its Basics"

Details Comment on "Kagome Lattice Antiferromagnet Stripped to Its Basics" Comment on "Kagome Lattice Antiferromagnet Stripped to Its Basics"

2000-03-03

arxiv.org/abs/cond-mat/0003037v1

Physics

Condensed Matter

Strongly Correlated Electrons

1 page, submitted to PRL

Scientific paper

10.1103/PhysRevLett.85.3330

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.

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