Nature of the magnetic order in the charge-ordered cuprate La1.48Nd0.4Sr0.12CuO4

Niels Bech Christensen, H.M. Rønnow, J. Mesot, R.A. Ewings, N. Momono, M. Oda, M. Ido, M. Enderle, D.F. McMorrow, A.T. Boothroyd

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    Abstract

    Using polarized neutron scattering we establish that the magnetic order in La1.48Nd0.4Sr0.12CuO4 is either (i) one dimensionally modulated and collinear, consistent with the stripe model or (ii) two dimensionally modulated with a novel noncollinear structure. The measurements rule out a number of alternative models characterized by 2D electronic order or 1D helical spin order. The low-energy spin excitations are found to be primarily transversely polarized relative to the stripe ordered state, consistent with conventional spin waves.
    Original languageEnglish
    JournalPhysical Review Letters
    Volume98
    Issue number19
    Pages (from-to)197003
    ISSN0031-9007
    DOIs
    Publication statusPublished - 2007

    Bibliographical note

    Copyright 2007 American Physical Society

    Keywords

    • FLUCTUATIONS
    • STATES
    • STRIPES
    • LA2-XSRXCUO4
    • NEUTRON-SCATTERING
    • COPPER-OXIDE SUPERCONDUCTORS
    • ANTIFERROMAGNET
    • TRANSITION-TEMPERATURE SUPERCONDUCTOR
    • SPIN EXCITATIONS
    • DEPENDENCE

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