Destruction of valence-bond order in a S=1/2 sawtooth chain with a 
Dzyaloshinskii-Moriya term

Hao, Z. H.; Wan, Y.; Rousochatzakis, I.; Wildeboer, J.; Seidel, A.; Mila, F.; Tchernyshyov, O.

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Journal Article

Destruction of valence-bond order in a S=1/2 sawtooth chain with a Dzyaloshinskii-Moriya term

MPS-Authors

/persons/resource/persons145752

Rousochatzakis, I.
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

External Resource

No external resources are shared

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

Fulltext (public)

There are no public fulltexts stored in PuRe

Supplementary Material (public)

There is no public supplementary material available

Citation

Hao, Z. H., Wan, Y., Rousochatzakis, I., Wildeboer, J., Seidel, A., Mila, F., et al. (2011). Destruction of valence-bond order in a S=1/2 sawtooth chain with a Dzyaloshinskii-Moriya term. Physical Review B, 84(9): 094452.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0029-8C0F-A

Abstract

A small value of the spin gap in quantum antiferromagnets with strong frustration makes them susceptible to nominally small deviations from the ideal Heisenberg model. One such perturbation, the anisotropic Dzyaloshinskii-Moriya (DM) interaction, is an important perturbation for the S = 1/2 kagome antiferromagnet, one of the current candidates for a quantum-disordered ground state. We study the influence of the DM term in a related one-dimensional system, the sawtooth chain, which has valence-bond order in its ground state. Through a combination of analytical and numerical methods, we show that a relatively weak DM coupling, 0.115J, is sufficient to destroy the valence-bond order, close the spin gap, and turn the system into a Luttinger liquid with algebraic spin correlations. A similar mechanism may be at work in the kagome antiferromagnet.