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】
Free