2004/02/29 by Kazuo Hida, Masaru Shiino, Wei Chen
Physics and Astronomy · #cond-mat.str-el #cond-mat.stat-mech
paper · pdf · doi:10.1143/jpsj.73.1587
published as J. Phys. Soc. Jpn., 73 (2004) 1587-1592 · 7 pages, 8 figures
arxiv created 2004/06/15 · arxiv updated 2009/12/01
The magnetization plateaux in two dimensionally coupled S=1/2 dimerized zigzag Heisenberg chains are investigated by means of the bond operator mean field approximation. In the absence of the interchain coupling, this model is known to have a plateau at half of the saturation magnetization accompanied by the spontanuous translational symmetry breakdown. The parameter regime in which the plateau appears is reproduced well within the present approximation. In the presence of the interchain coupling, this plateau is shown to be suppressed. This result is also supported by the numerical diagonalization calculation.