Ananthakrishna, G
(1975)
*Antiferromagnetic spin-wave states in a linear chain with nearest- and next-nearest-neighbour interactions.*
In: Journal of Physics C: Solid State Physics, 8
(5).
717 -722.

PDF
jcv8i5p717.pdf - Published Version Restricted to Registered users only Download (360kB) | Request a copy |

## Abstract

The spectrum of short-closed chains up to N=12 are studied by exact diagonalization to obtain the spin-wave spectrum of the Hamiltonian H=2J Sigma i=1Nsi.si+1+2J alpha Sigma i=1Nsi.si+2, -1.0<or= alpha <or=1.0 with J<0. The spin-wave spectrum is fairly well described for small alpha by the spin-wave formula obtained by the Anderson approximation (1952). The results of short chains indicate that S=0 bound magnon states lie partly below the spin-wave states with S=1 only for alpha >or=0.3 and alpha <or=-0.5. A few remarks are made concerning the low-lying excitations.

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

Publication: | Journal of Physics C: Solid State Physics |

Publisher: | Institute of Physics |

Additional Information: | Copyright of this article belongs to Institute of Physics. |

Department/Centre: | Division of Physical & Mathematical Sciences > Physics |

Date Deposited: | 19 Oct 2009 09:19 |

Last Modified: | 19 Sep 2010 05:49 |

URI: | http://eprints.iisc.ac.in/id/eprint/24188 |

### Actions (login required)

View Item |