Phys. Rev. Lett. 69, 832–835 (1992)Order from disorder in a kagomé antiferromagnetReceived 9 April 1992; published in the issue dated 3 August 1992 A Heisenberg antiferromagnet on a kagomé lattice is highly degenerate in the classical limit. I show that quantum fluctuations lift the degeneracy and yeild the low-energy branch of spin-wave excitations with a velocity which is a factor S-1/3 smaller than for conventional spin waves. The relevance of these results to the experiments on the stacked kagomé antiferromagnet SrCr8-xGa4+xO19 is discussed. © 1992 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.69.832
DOI:
10.1103/PhysRevLett.69.832
PACS:
75.10.Jm, 75.50.Lk
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.