### Abstract

We have measured the solvation dynamics of a dipolar supercooled liquid near its glass transition in a temperature range in which the average structural relaxation time varies more than four orders of magnitude. The analysis of the time dependent average emission energy and the inhomogeneous linewidth of the S_{0} ←T_{1}(0-0) transition reveals that the orientation correlation decay pattern intrinsic in each relaxing unit is associated with a stretching exponent β_{intr}=1.00±0.08 in the entire range T_{8}≤T≤T_{8} + 6 K. Our analysis also allows one to detect fluctuations in terms of the resulting apparent homogeneity within the long time tail of the decay. Even at times significantly exceeding the average structural relaxation time, no sign of a transition towards purely exponential or otherwise homogeneous behavior could be observed. This implies that even at t≈50〈τ〉_{KWW} the individual time constants remain correlated to their initial values at t=0.

Original language | English (US) |
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Pages (from-to) | 1722-1728 |

Number of pages | 7 |

Journal | Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics |

Volume | 61 |

Issue number | 2 |

State | Published - Feb 2000 |

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### ASJC Scopus subject areas

- Mathematical Physics
- Physics and Astronomy(all)
- Condensed Matter Physics
- Statistical and Nonlinear Physics
- Statistics and Probability

### Cite this

**Heterogeneous relaxation patterns in supercooled liquids studied by solvation dynamics.** / Wendt, Hauke; Richert, Ranko.

Research output: Contribution to journal › Article

*Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics*, vol. 61, no. 2, pp. 1722-1728.

}

TY - JOUR

T1 - Heterogeneous relaxation patterns in supercooled liquids studied by solvation dynamics

AU - Wendt, Hauke

AU - Richert, Ranko

PY - 2000/2

Y1 - 2000/2

N2 - We have measured the solvation dynamics of a dipolar supercooled liquid near its glass transition in a temperature range in which the average structural relaxation time varies more than four orders of magnitude. The analysis of the time dependent average emission energy and the inhomogeneous linewidth of the S0 ←T1(0-0) transition reveals that the orientation correlation decay pattern intrinsic in each relaxing unit is associated with a stretching exponent βintr=1.00±0.08 in the entire range T8≤T≤T8 + 6 K. Our analysis also allows one to detect fluctuations in terms of the resulting apparent homogeneity within the long time tail of the decay. Even at times significantly exceeding the average structural relaxation time, no sign of a transition towards purely exponential or otherwise homogeneous behavior could be observed. This implies that even at t≈50〈τ〉KWW the individual time constants remain correlated to their initial values at t=0.

AB - We have measured the solvation dynamics of a dipolar supercooled liquid near its glass transition in a temperature range in which the average structural relaxation time varies more than four orders of magnitude. The analysis of the time dependent average emission energy and the inhomogeneous linewidth of the S0 ←T1(0-0) transition reveals that the orientation correlation decay pattern intrinsic in each relaxing unit is associated with a stretching exponent βintr=1.00±0.08 in the entire range T8≤T≤T8 + 6 K. Our analysis also allows one to detect fluctuations in terms of the resulting apparent homogeneity within the long time tail of the decay. Even at times significantly exceeding the average structural relaxation time, no sign of a transition towards purely exponential or otherwise homogeneous behavior could be observed. This implies that even at t≈50〈τ〉KWW the individual time constants remain correlated to their initial values at t=0.

UR - http://www.scopus.com/inward/record.url?scp=0000109738&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0000109738&partnerID=8YFLogxK

M3 - Article

VL - 61

SP - 1722

EP - 1728

JO - Physical Review E - Statistical, Nonlinear, and Soft Matter Physics

JF - Physical Review E - Statistical, Nonlinear, and Soft Matter Physics

SN - 1539-3755

IS - 2

ER -