Antiferromagnetic spin-wave states in a linear chain with nearest- and next-nearest-neighbour interactions
- 7 March 1975
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 8 (5) , 717-722
- https://doi.org/10.1088/0022-3719/8/5/017
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 Jor=0.3 and alpha <or=-0.5. A few remarks are made concerning the low-lying excitations.Keywords
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