Excitations of the field-induced quantum soliton lattice in CuGeO3

M. Enderle, H.M. Rønnow, D.F. McMorrow, L.P. Regnault, G. Dhalenne, A. Revcholevschi, P. Vorderwisch, H. Schneider, P. Smeibidl, M. Meissner

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    The incommensurate magnetic soliton lattice in the high-field phase of a spin-Peierls system results from quantum fluctuations. We have used neutron scattering techniques to study CuGeO3, allowing us to obtain the first complete characterization of the excitations of the soliton lattice. Three distinct excitation branches are observed, all of which are gapped. The two highest energy modes have minimum gaps at the commensurate wave vector and correspond to the creation or annihilation of soliton pairs. The third mode is incommensurate and is discussed in relation to theoretical predictions.
    Original languageEnglish
    JournalPhysical Review Letters
    Volume87
    Issue number17
    Pages (from-to)177203.1-177203.4
    ISSN0031-9007
    DOIs
    Publication statusPublished - 2001

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