Large moment formation and thermodynamic properties of disordered spin ladders with site dilution

Article

关键词: LOW-TEMPERATURE PROPERTIES;    ANTI-FERROMAGNETIC CHAIN;    NONMAGNETIC IMPURITIES;    ANTIFERROMAGNETIC CORRELATIONS;    FIXED-POINTS;    SYSTEMS;    SRCU2O3;    ENHANCEMENT;    TRANSITION;    RANDOMNESS;   

DOI  :  10.1103/PhysRevB.67.144409

来源: SCIE

【 摘 要 】

Low temperature properties of antiferromagnetic two-leg spin-1/2 ladders with bond randomness and site dilution (or doping with nonmagnetic impurities) are studied using the real-space renormalization-group technique. We find that for nonzero dopant concentrations the systems are driven into a phase dominated by large effective spins, i.e., the large spin phase. The susceptibility follows a universal Curie-like 1/T behavior at low temperature, regardless of the dopant concentration (as long as it is nonzero) and the strength of bond randomness. A very similar behavior has been found in ladders that are doped with magnetic impurities that carry spin-1.

【 授权许可】

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