Impurity effects in coupled-ladder BiCu2PO6 studied by NMR and quantum Monte Carlo simulations

Abstract

We present a 31P NMR study of the coupled spin 1/2 ladder compound BiCu2PO6. In the pure material, intrinsic susceptibility and dynamics show a spin gap of about . Substitution of non magnetic Zn or magnetic Ni impurity at Cu site induces a staggered magnetization which results in a broadening of the 31P NMR line, while susceptibility far from the defects is unaffected. The effect of Ni on the NMR line broadening is twice that of Zn, which is consistent with Quantum Monte Carlo (QMC) calculations assuming that Ni couples ferromagnetically to its adjacent Cu. The induced moment follows a 1/T temperature dependence due to the Curie-like development of the moment amplitude while its extension saturates and does not depend on impurity content or nature. This allow us to verify the generically expected scenario for impurity doping and to extend it to magnetic impurity case: in an antiferromagnetically correlated low dimensional spin system with antiferromagnetic correlations, any type of impurity induces a staggered moment at low temperature, whose extension is not linked to the impurity nature but to the intrinsic physics at play in the undoped pure system, from 1D to 2D systems.

11 pages, 16 figures

References in corpus (9)

• The ALPS project release 1.3: open source software for strongly correlated systems
• Generalized Directed Loop Method for Quantum Monte Carlo Simulations
• Evidence of Unconventional Universality Class in a Two-Dimensional Dimerized Quantum Heisenberg Model
• Supplementary material for "Impurity-induced magnetic order in low dimensional spin gapped materials"
• Spin-gap behaviour in the 2-leg spin-ladder BiCu2PO6
• Impurity induced spin texture in quantum critical 2D antiferromagnets
• Valence bond solid order near impurities in two-dimensional quantum antiferromagnets
• Doping effects in the coupled, two-leg spin ladder BiCu2PO6
• NMR Response in quasi one-dimensional Spin-1/2 Antiferromagnets

Cited by in corpus (19)

• Phase diagram of hard-core bosons on clean and disordered 2-leg ladders: Mott insulator - Luttinger liquid - Bose glass
• Bridging frustrated-spin-chain and spin-ladder physics: quasi-one-dimensional magnetism of BiCu2PO6
• Singlet Ground State of the Quantum Antiferromagnet Ba3CuSb2O9
• Magnetic transitions in the spin S=5/2 frustrated magnet BiMn2PO6 and strong lattice softening in BiMn2PO6 and BiZn2PO6 below 200 K
• Melting of a frustration-induced dimer crystal and incommensurability in the J_1-J_2 two-leg ladder
• Slow Electronic Dynamics in the Paramagnetic State of UTe${}_2$
• Direct observation of impurity-induced magnetism in an S = 1/2 antiferromagnetic Heisenberg 2-leg spin ladder
• Temperature dependence of the NMR relaxation rate 1/T_1 for quantum spin chains
• Evidence for Dimer Crystal Melting in the Frustrated Spin-Ladder BiCu2PO6
• Theory of triplon dynamics in the quantum magnet BiCu${}_2$PO${}_6$
• Magnetic responses of randomly depleted spin ladders
• Minimal model for the frustrated spin ladder system BiCu${}_2$PO${}_6$
• Defect-induced spin-glass magnetism in incommensurate spin-gap magnets
• Two Coupled Chains are Simpler than One: Field-induced Chirality in a Frustrated Quantum Spin Ladder
• Low-energy spin excitations in field-induced phases of the spin-ladder antiferromagnet BiCu${}_2$PO${}_6$
• Quantum Monte Carlo Simulations for Stacked Spin Ladder Systems Containing Low Concentrations of Non-Magnetic Impurities; Application to the Low Temperature Broadening of NMR-Spectra in SrCu2O3
• Effects of edge disorder in nano-scale antiferromagnetic clusters
• Spin-Spin Correlation Enhanced by Impurities in a Frustrated Two-leg Spin Ladder
• Spin-$S$ impurities with XXZ anisotropy in a spin-1/2 Heisenberg chain