Large Spin Formation and Thermodynamic Properties of Disordered Spin Ladders with Site Dilution

Abstract

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 non zero doping 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 doping concentrations (as long as it is nonzero) and the strength of bond randomness. Very similar behavior has been found in ladders that are doped with magnetic impurities that carry spin-1.

9 pages, 4 figures

References in corpus (2)

• Strongly disordered spin ladders
• Thermodynamics of strongly disordered spin ladders

Cited by in corpus (7)

• Rare region effects at classical, quantum, and non-equilibrium phase transitions
• Strong disorder RG approach of random systems
• Disorder-Driven Non-Fermi Liquid Behavior of Correlated Electrons
• Low-energy fixed points of random Heisenberg models
• Strong disorder renormalization group study of S=1/2 Heisenberg antiferromagnet layers/bilayers with bond randomness, site dilution and dimer dilution
• Random Antiferromagnetic Spin-1/2 Chains with Competing Interactions
• Magnetic responses of randomly depleted spin ladders