Numerical studies of spin-wave dynamics in Heisenberg spin-glasses

W. Y. Ching, D. L. Huber, Kok-Ming Leung

    Research output: Contribution to journalArticle

    Abstract

    We outline the numerical techniques used in calculating the one-magnon zero-temperature dynamic structure factor of a Heisenberg spin-glass. We employ equation-of-motion methods to study the dynamics of the Edwards-Anderson model where the exchange integral between nearest neighbors has a Gaussian distribution with zero mean and no correlation between different bonds. Numerical results are presented for a 16 × 16 × 16 simple cubic lattice with periodic boundary conditions. No evidence is found for long-wavelength propagating modes. A fit to the data suggests that at small q the structure factor is peaked at E=0. The methods are completely general and can be applied to other Heisenberg systems provided the exchange integrals and equilibrium spin orientations of the corresponding classical Hamiltonian are available as input.

    Original languageEnglish (US)
    Pages (from-to)6126-6132
    Number of pages7
    JournalPhysical Review B
    Volume23
    Issue number11
    DOIs
    StatePublished - 1981

    Fingerprint

    Spin waves
    Spin glass
    spin glass
    magnons
    Hamiltonians
    Gaussian distribution
    cubic lattices
    normal density functions
    Equations of motion
    equations of motion
    Boundary conditions
    boundary conditions
    Wavelength
    wavelengths
    Temperature
    temperature

    ASJC Scopus subject areas

    • Condensed Matter Physics

    Cite this

    Numerical studies of spin-wave dynamics in Heisenberg spin-glasses. / Ching, W. Y.; Huber, D. L.; Leung, Kok-Ming.

    In: Physical Review B, Vol. 23, No. 11, 1981, p. 6126-6132.

    Research output: Contribution to journalArticle

    Ching, W. Y. ; Huber, D. L. ; Leung, Kok-Ming. / Numerical studies of spin-wave dynamics in Heisenberg spin-glasses. In: Physical Review B. 1981 ; Vol. 23, No. 11. pp. 6126-6132.
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