Chitra, R and Rao, Sumathi and Diptiman, Sen and Suresh, Rao R
(1995)
*Bosonic mean-field theory for frustrated Heisenberg antiferromagnets in two dimensions.*
In: Physical Review B, 52
(2).
pp. 1061-1069.

PDF
Bosonic-1.pdf Restricted to Registered users only Download (1MB) | Request a copy |

## Abstract

We use a recently developed bosonic mean-field theory to study the ordered ground states of frustrated Heisenberg antiferromagnets in two dimensions. We emphasize the role of condensates in satisfying the mean-field variational equations and their relation to spin-correlation functions at low temperatures. This mean-field theory is closely related to a spin-wave theory that enables us to obtain the spin-wave spectrum easily (without any rotation of axes) for an entire class of three-dimensionally ordered states. For the frustrated Heisenberg antiferromagnet on a triangular lattice, we use this theory to compute the spin-wave spectrum for all values of $J_2/J_1$ and demonstrate the phenomenon of order from disorder.

Item Type: | Journal Article |
---|---|

Additional Information: | Copyright of this artcile belongs to American Physical Society. |

Department/Centre: | Division of Physical & Mathematical Sciences > Centre for Theoretical Studies (Ceased to exist at the end of 2003) Division of Physical & Mathematical Sciences > Physics |

Depositing User: | Anka Setty |

Date Deposited: | 06 Jun 2007 |

Last Modified: | 19 Sep 2010 04:38 |

URI: | http://eprints.iisc.ac.in/id/eprint/11135 |

### Actions (login required)

View Item |