Abstract
Generalized susceptibility χ(q,ω) for binary soft-sphere mixtures is computed for the first time for a frequency range which includes both the α and β peaks in a supercooled fluid phase with a superlongtime (10 × 106 time steps) molecular dynamics simulation. This gives us reliable spectral data in a wide frequency range of over 5 orders of magnitude and at various wave numbers, so that we can discuss without ambiguity the dynamical behavior of both α and β relaxations. The α and β peaks in χ′′(q,ω) are obtained for the first time by molecular dynamics simulation. It is shown that the α peak has a non-Debye-type ω dependence, the β peak is essentially of a Debye type, and a crossover between the α and β peaks manifests itself in the so-called β relaxation.
| Original language | English |
|---|---|
| Pages (from-to) | 2452-2455 |
| Number of pages | 4 |
| Journal | Physical Review Letters |
| Volume | 73 |
| Issue number | 18 |
| DOIs | |
| Publication status | Published - Jan 1 1994 |
| Externally published | Yes |
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All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)
Cite this
Study of the slow dynamics in a highly supercooled fluid : Superlong-time molecular-dynamics calculation of the generalized susceptibility. / Matsui, J.; Odagaki, T.; Hiwatari, Y.
In: Physical Review Letters, Vol. 73, No. 18, 01.01.1994, p. 2452-2455.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Study of the slow dynamics in a highly supercooled fluid
T2 - Superlong-time molecular-dynamics calculation of the generalized susceptibility
AU - Matsui, J.
AU - Odagaki, T.
AU - Hiwatari, Y.
PY - 1994/1/1
Y1 - 1994/1/1
N2 - Generalized susceptibility χ(q,ω) for binary soft-sphere mixtures is computed for the first time for a frequency range which includes both the α and β peaks in a supercooled fluid phase with a superlongtime (10 × 106 time steps) molecular dynamics simulation. This gives us reliable spectral data in a wide frequency range of over 5 orders of magnitude and at various wave numbers, so that we can discuss without ambiguity the dynamical behavior of both α and β relaxations. The α and β peaks in χ′′(q,ω) are obtained for the first time by molecular dynamics simulation. It is shown that the α peak has a non-Debye-type ω dependence, the β peak is essentially of a Debye type, and a crossover between the α and β peaks manifests itself in the so-called β relaxation.
AB - Generalized susceptibility χ(q,ω) for binary soft-sphere mixtures is computed for the first time for a frequency range which includes both the α and β peaks in a supercooled fluid phase with a superlongtime (10 × 106 time steps) molecular dynamics simulation. This gives us reliable spectral data in a wide frequency range of over 5 orders of magnitude and at various wave numbers, so that we can discuss without ambiguity the dynamical behavior of both α and β relaxations. The α and β peaks in χ′′(q,ω) are obtained for the first time by molecular dynamics simulation. It is shown that the α peak has a non-Debye-type ω dependence, the β peak is essentially of a Debye type, and a crossover between the α and β peaks manifests itself in the so-called β relaxation.
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U2 - 10.1103/PhysRevLett.73.2452
DO - 10.1103/PhysRevLett.73.2452
M3 - Article
AN - SCOPUS:3743131565
VL - 73
SP - 2452
EP - 2455
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 18
ER -