Elementary excitations in antiferromagnetic Heisenberg systems

P.L. Iske, W.J. Caspers

    Research output: Contribution to journalArticleAcademic

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    Abstract

    The structure of the (eigen)states of antiferromagnetic Heisenberg systems is discussed. These systems are shown to be equivalent to classical systems of coupled harmonic oscillators. Most attention will be paid to the first excited state. This state is supposed to be a triplet. An approximation method, which is a generalization of a method, used to describe the ground state of Heisenberg systems, will be used to describe elementary excitations. The working of the method is demonstrated by some small-system calculations.
    Original languageEnglish
    Pages (from-to)151-174
    JournalPhysica A
    Volume146
    Issue number1-2
    DOIs
    Publication statusPublished - 1987

    Fingerprint

    elementary excitations
    harmonic oscillators
    Excitation
    ground state
    approximation
    excitation
    Excited States
    Coupled Oscillators
    Harmonic Oscillator
    Approximation Methods
    Ground State

    Cite this

    Iske, P.L. ; Caspers, W.J. / Elementary excitations in antiferromagnetic Heisenberg systems. In: Physica A. 1987 ; Vol. 146, No. 1-2. pp. 151-174.
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    Elementary excitations in antiferromagnetic Heisenberg systems. / Iske, P.L.; Caspers, W.J.

    In: Physica A, Vol. 146, No. 1-2, 1987, p. 151-174.

    Research output: Contribution to journalArticleAcademic

    TY - JOUR

    T1 - Elementary excitations in antiferromagnetic Heisenberg systems

    AU - Iske, P.L.

    AU - Caspers, W.J.

    PY - 1987

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    AB - The structure of the (eigen)states of antiferromagnetic Heisenberg systems is discussed. These systems are shown to be equivalent to classical systems of coupled harmonic oscillators. Most attention will be paid to the first excited state. This state is supposed to be a triplet. An approximation method, which is a generalization of a method, used to describe the ground state of Heisenberg systems, will be used to describe elementary excitations. The working of the method is demonstrated by some small-system calculations.

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    DO - 10.1016/0378-4371(87)90226-3

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