Recent Progress of the Low-Dimensional Spin-Wave Theory
arXiv:cond-mat/0310004
Abstract
A modified spin-wave theory is developed and applied to low-dimensional quantum magnets. Double-peaked specific heat for one-dimensional ferrimagnets, nuclear spin-lattice relaxation in ferrimagnetic chains and clusters, and thermal behavior of Haldane-gap antiferromagnets are described within the scheme. Mentioning other bosonic and fermionic representations as well, we demonstrate that spin waves are still effective in low dimensions.
to be published in "Recent Research Developments in Physics Vol.4" (Transworld Research Network, Kerala, 2003)