Spin-liquid versus dimer phases in an anisotropic J(1)-J(2) frustrated square antiferromagnet

Article

关键词: QUANTUM HEISENBERG-ANTIFERROMAGNET;    LATTICE ANTIFERROMAGNET;    CHAIN;    DIMERIZATION;    MODEL;    STATE;    BOSONIZATION;    MAGNETS;    SYSTEMS;    ORDER;   

DOI  :  10.1103/PhysRevB.89.241104

来源: SCIE

【 摘 要 】

The spin-1/2 J(1)-J(2) antiferromagnet is a prototypical model for frustratedmagnetism and one possible candidate for a realization of a spin-liquid phase. The generalization of this system on the anisotropic square lattice is given by the J(1)-J(2)-J(1)'-J(2)' Heisenberg model, which can be treated by a renormalization group analysis of coupled frustrated chains. The J(1)-J(2)-J(1)'-J(2)'-model shows an interesting interplay of Neel order, dimerization, and spin-liquid behavior. Extrapolating the analytical findings supported by numerical results indicates that for the isotropic model the phase at intermediate coupling strength 0.4J(1) less than or similar to J(2) <= 0.6J(1) is not a spin liquid, but has instead a staggered dimer order.

【 授权许可】

Free