Low-energy properties and magnetization plateaus in a 2-leg mixed spin ladder

Details Low-energy properties and magnetization plateaus in a 2-leg mixed spin ladder Low-energy properties and magnetization plateaus in a 2-leg mixed spin ladder

2001-09-02

arxiv.org/abs/cond-mat/0109014v1

Phys. Rev. B 64, 144403 (2001)

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages with 8 eps figures

Scientific paper

10.1103/PhysRevB.64.144403

Using the density matrix renormalization group technique we investigate the low-energy properties and the magnetization plateau behavior in a 2-leg mixed spin ladder consisting of a spin-1/2 chain coupled with a spin-1 chain. The calculated results show that the system is in the same universality class as the spin-3/2 chain when the interchain coupling is strongly ferromagnetic, but the similarity between the two systems is less clear under other coupling conditions. We have identified two types of magnetization plateau phases. The calculation of the magnetization distribution on the spin-1/2 and the spin-1 chains on the ladder shows that one plateau phase is related to the partially magnetized valence-bond-solid state, and the other plateau state contains strongly coupled S=1 and s=1/2 spins on the rung.

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