Impurity-Induced Magnetic Order in Low-Dimensional Spin-Gapped Materials

J. Bobroff, N. Laflorencie, L. K. Alexander, A. V. Mahajan, B. Koteswararao, and P. Mendels
Phys. Rev. Lett. 103, 047201 – Published 21 July 2009
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Abstract

We have studied the effect of nonmagnetic Zn impurities in the coupled spin ladder Bi(Cu1xZnx)2PO6 using P31 NMR, muon spin resonance (μSR), 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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  • Received 6 March 2009

DOI:https://doi.org/10.1103/PhysRevLett.103.047201

©2009 American Physical Society

Authors & Affiliations

J. Bobroff1, N. Laflorencie1, L. K. Alexander1, A. V. Mahajan2, B. Koteswararao2, and P. Mendels1

  • 1Laboratoire de Physique des Solides, Université Paris-Sud, UMR-8502 CNRS, 91405 Orsay, France
  • 2Department of Physics, Indian Institute of Technology Bombay, Mumbai 400076, India

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Issue

Vol. 103, Iss. 4 — 24 July 2009

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