### Resumé

Originalsprog | Udefineret/Ukendt |
---|---|

Tidsskrift | EPL |

Vol/bind | 71 |

Udgave nummer | 4 |

Sider (fra-til) | 646-650 |

ISSN | 0295-5075 |

DOI | |

Status | Udgivet - 2005 |

### Citer dette

*EPL*,

*71*(4), 646-650. https://doi.org/10.1209/epl/i2005-10122-3

}

*EPL*, bind 71, nr. 4, s. 646-650. https://doi.org/10.1209/epl/i2005-10122-3

**A model for the generic alpha relaxation in viscous liquids.** / Dyre, Jeppe.

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review

TY - JOUR

T1 - A model for the generic alpha relaxation in viscous liquids

AU - Dyre, Jeppe

PY - 2005

Y1 - 2005

N2 - Dielectric measurements on molecular liquids just above the glass transition indicate that alpha relaxation is characterized by a generic high-frequency loss varying as one over square root of frequency, whereas deviations from this come from one or more low-lying beta processes [Olsen et al., Phys. Rev. Lett., 86 (2001) 1271]. Assuming that long-wavelength fluctuations dominate the dynamics, a model for the dielectric alpha relaxation based on the simplest coupling between the density and dipole density fields is proposed here. The model, which is solved in second-order perturbation theory in the Gaussian approximation, reproduces the generic features of alpha relaxation.

AB - Dielectric measurements on molecular liquids just above the glass transition indicate that alpha relaxation is characterized by a generic high-frequency loss varying as one over square root of frequency, whereas deviations from this come from one or more low-lying beta processes [Olsen et al., Phys. Rev. Lett., 86 (2001) 1271]. Assuming that long-wavelength fluctuations dominate the dynamics, a model for the dielectric alpha relaxation based on the simplest coupling between the density and dipole density fields is proposed here. The model, which is solved in second-order perturbation theory in the Gaussian approximation, reproduces the generic features of alpha relaxation.

U2 - 10.1209/epl/i2005-10122-3

DO - 10.1209/epl/i2005-10122-3

M3 - Tidsskriftartikel

VL - 71

SP - 646

EP - 650

JO - EPL

JF - EPL

SN - 0295-5075

IS - 4

ER -