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

Article

关键词: ANTIFERROMAGNETIC HEISENBERG CHAIN;    QUANTUM RENORMALIZATION-GROUPS;    LOW-TEMPERATURE PROPERTIES;    CONFORMAL-INVARIANCE;    FIELD-THEORY;    HALDANE-GAP;    EDGE STATES;    FERRIMAGNETS;    S=1;   

DOI  :  10.1103/PhysRevB.64.144403

来源: SCIE

【 摘 要 】

Using the density-matrix renormalization-group technique we investigate the low-energy properties and the magnetization-plateau behavior in a two-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.

【 授权许可】

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