Critical properties of doped coupled spin-Peierls chains

Abstract

Using numerical Real Space Renormalisation Group methods as well as Stochastic Series Expansions Quantum Monte Carlo simulations a generic model of diluted spin-1/2 impurities interacting at long distances is investigated. Such a model gives a generic description of coupled dimerized spin-Peierls chains doped with non-magnetic impurities at temperatures lower than the spin gap. A scaling regime with temperature power-law behaviors in several quantities like the uniform or staggered susceptibilities is identified and interpreted in terms of large clusters of correlated spins.

4 pages, 7 figures. Direct comparison between RSRG and SSE provided

References in corpus (4)

• Stochastic series expansion method for quantum Ising models with arbitrary interactions
• Low-energy fixed points of random Heisenberg models
• Doped coupled frustrated spin-1/2 chains with four-spin exchange
• Magnetic ordering in a doped frustrated spin-Peierls system

Cited by in corpus (8)

• Quantum-criticality and percolation in dimer-diluted 2D antiferromagnets
• Field-induced quantum disordered phases in S=1/2 weakly-coupled dimer systems with site dilution
• Magnetic responses of randomly depleted spin ladders
• Impact of strong disorder on the static magnetic properties of the spin-chain compound BaCu2SiGeO7
• Magnetic Bose glass phases of coupled antiferromagnetic dimers with site dilution
• A mean-field theory for strongly disordered non-frustrated antiferromagnets
• Defect-induced spin-glass magnetism in incommensurate spin-gap magnets
• Correlations in Quantum Spin Ladders with Site and Bond Dilution