Combined analytical and numerical approach to study magnetization plateaux in doped quasi-one-dimensional antiferromagnets

Article

关键词: NEXT-NEAREST-NEIGHBOR;    HIGH-FIELD MAGNETIZATION;    PHASE-DIAGRAM;    SPIN CHAIN;    QUANTUM;    MODEL;   

DOI  :  10.1103/PhysRevB.84.115125

来源: SCIE

【 摘 要 】

We investigate the magnetic properties of quasi-one-dimensional quantum spin-S antiferromagnets. We use a combination of analytical and numerical techniques to study the presence of plateaux in the magnetization curve. The analytical technique consists in a path integral formulation in terms of coherent states. This technique can be extended to the presence of doping and has the advantage of a much better control for large spins than the usual bosonization technique. We discuss the appearance of doping-dependent plateaux in the magnetization curves for spin-S chains and ladders. The analytical results are complemented by a density matrix renormalization group (DMRG) study for a trimerized spin-1/2 and anisotropic spin-3/2 doped chains.

【 授权许可】

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