Bond Operator Mean Field Approach to the Magnetization Plateaux in Quantum Antiferromagnets -- Application to the S=1/2 Coupled Dimerized Zigzag Heisenberg Chains
arXiv:cond-mat/0402008 · doi:10.1143/JPSJ.73.1587
Abstract
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.
7 pages, 8 figures
References in corpus (12)
- Magnetization plateaus in spin chains: ``Haldane gap'' for half-integer spins
- Spin-ladders with spin gaps: A description of a class of cuprates
- Magnon Dispersion in the Field-Induced Magnetically Ordered Phase of TlCuCl3
- Magnetic Properties of the Spin-1/2 Ferromagnetic-Ferromagnetic-Antiferromagnetic Trimerized Heisenberg Chain:
- Magnetic phase diagram of the S=1/2 antiferromagnetic zigzag spin chain in the strongly frustrated region: cusp and plateau
- Magnetic properties and spin waves of bilayer magnets in a uniform field
- Ground-state magnetization curve of a generalized spin-1/2 ladder
- Fractional S^z excitation and its bound state around the 1/3 plateau of the S=1/2 Ising-like zigzag XXZ chain
- Magnetization plateaus in weakly coupled dimer spin system
- Microscopic model for the magnetization plateaus in NH4CuCl3
- Bond-Operator Mean Field Theory for the Bilayer Heisenberg Model
- Magnetization cusp singularities of frustrated Kondo necklace model
Cited by in corpus (4)
- Magnetization plateau in the S=1/2 spin ladder with alternating rung exchange
- Magnetic phase diagram of a spin S=1/2 antiferromagnetic two-leg ladder in the presence of modulated along legs Dzyaloshinskii-Moriya interaction
- Enhanced magnetocaloric effect in a mixed spin-(1/2, 1) Ising-Heisenberg two-leg ladder with strong-rung interaction
- Concurrence and entanglement entropy in a dimerized spin-1/2 two-leg ladder