Abstract
We investigate the magnetization process for a quasi-one-dimensional antiferromagnet with bond alternation. By combining the density matrix renormalization group method with the interchain mean-field theory, we discuss how the interchain coupling affects the magnetization curve. It is found that the width of the magnetization plateau is considerably reduced upon introducing the interchain coupling. We obtain the phase diagram in a magnetic field. The effect of single-ion anisotropy is also addressed.
- Received 9 January 2002
DOI:https://doi.org/10.1103/PhysRevB.65.214405
©2002 American Physical Society