Growing correlation length on cooling below the onset of caging in a simulated glass-forming liquid

N. Lačević, F. W. Starr, Thomas Schrøder, V. N. Novikov, S. C. Glotzer

    Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

    Resumé

    We present a calculation of a fourth-order, time-dependent density correlation function that measures higher-order spatiotemporal correlations of the density of a liquid. From molecular dynamics simulations of a glass-forming Lennard-Jones liquid, we find that the characteristic length scale of this function has a maximum as a function of time which increases steadily beyond the characteristic length of the static pair correlation function g(r) in the temperature range approaching the mode coupling temperature from above. This length scale provides a measure of the spatially heterogeneous nature of the dynamics of the liquid in the alpha-relaxation regime.
    OriginalsprogEngelsk
    TidsskriftPhysical Review E (Statistical, Nonlinear, and Soft Matter Physics)
    Vol/bind66
    Udgave nummer3
    Antal sider4
    ISSN1539-3755
    DOI
    StatusUdgivet - 2002

    Bibliografisk note

    Paper id:: 030101

    Citer dette

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    title = "Growing correlation length on cooling below the onset of caging in a simulated glass-forming liquid",
    abstract = "We present a calculation of a fourth-order, time-dependent density correlation function that measures higher-order spatiotemporal correlations of the density of a liquid. From molecular dynamics simulations of a glass-forming Lennard-Jones liquid, we find that the characteristic length scale of this function has a maximum as a function of time which increases steadily beyond the characteristic length of the static pair correlation function g(r) in the temperature range approaching the mode coupling temperature from above. This length scale provides a measure of the spatially heterogeneous nature of the dynamics of the liquid in the alpha-relaxation regime.",
    author = "N. Lačević and Starr, {F. W.} and Thomas Schr{\o}der and Novikov, {V. N.} and Glotzer, {S. C.}",
    note = "Paper id:: 030101",
    year = "2002",
    doi = "10.1103/PhysRevE.66.030101",
    language = "English",
    volume = "66",
    journal = "Physical Review E",
    issn = "2470-0045",
    publisher = "American Physical Society",
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    Growing correlation length on cooling below the onset of caging in a simulated glass-forming liquid. / Lačević, N.; Starr, F. W.; Schrøder, Thomas; Novikov, V. N.; Glotzer, S. C.

    I: Physical Review E (Statistical, Nonlinear, and Soft Matter Physics), Bind 66, Nr. 3, 2002.

    Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

    TY - JOUR

    T1 - Growing correlation length on cooling below the onset of caging in a simulated glass-forming liquid

    AU - Lačević, N.

    AU - Starr, F. W.

    AU - Schrøder, Thomas

    AU - Novikov, V. N.

    AU - Glotzer, S. C.

    N1 - Paper id:: 030101

    PY - 2002

    Y1 - 2002

    N2 - We present a calculation of a fourth-order, time-dependent density correlation function that measures higher-order spatiotemporal correlations of the density of a liquid. From molecular dynamics simulations of a glass-forming Lennard-Jones liquid, we find that the characteristic length scale of this function has a maximum as a function of time which increases steadily beyond the characteristic length of the static pair correlation function g(r) in the temperature range approaching the mode coupling temperature from above. This length scale provides a measure of the spatially heterogeneous nature of the dynamics of the liquid in the alpha-relaxation regime.

    AB - We present a calculation of a fourth-order, time-dependent density correlation function that measures higher-order spatiotemporal correlations of the density of a liquid. From molecular dynamics simulations of a glass-forming Lennard-Jones liquid, we find that the characteristic length scale of this function has a maximum as a function of time which increases steadily beyond the characteristic length of the static pair correlation function g(r) in the temperature range approaching the mode coupling temperature from above. This length scale provides a measure of the spatially heterogeneous nature of the dynamics of the liquid in the alpha-relaxation regime.

    U2 - 10.1103/PhysRevE.66.030101

    DO - 10.1103/PhysRevE.66.030101

    M3 - Journal article

    VL - 66

    JO - Physical Review E

    JF - Physical Review E

    SN - 2470-0045

    IS - 3

    ER -