Impurity-induced magnetic order in low dimensional spin gapped materials

Details Impurity-induced magnetic order in low dimensional spin gapped materials Impurity-induced magnetic order in low dimensional spin gapped materials

2009-03-06

arxiv.org/abs/0903.1234v2

Phys. Rev. Lett. 103, 047201 (2009)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 4 figures; Supplemental material at arXiv:0907.0211

Scientific paper

We have studied the effect of non-magnetic Zn impurities in the coupled spin-ladder Bi(Cu1xZnx)2PO6 using 31P NMR, muSR and Quantum Monte Carlo simulations. Our results show that the impurities induce in their vicinity antiferromagnetic polarizations, extending over a few unit cells. At low temperature, these extended moments freeze in a process which is found universal among various other spin-gapped compounds: isolated ladders, Haldane or Spin-Peierls chains. This allows us to propose a simple common framework to explain the generic low-temperature impurity induced freezings observed in low dimensional spin-gapped materials.

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