6533b7ddfe1ef96bd1273d44

RESEARCH PRODUCT

Four-time rotational correlation functions

Hans SillescuGerald HinzeGregor Diezemann

subject

PhysicsRank (linear algebra)business.industryRelaxation (NMR)General Physics and AstronomyCondensed Matter::Soft Condensed MatterRange (mathematics)OpticsDynamic light scatteringSimple (abstract algebra)Statistical physicsDynamical heterogeneitySupercoolingbusinessGlass transition

description

A scheme to analyze four-time rotational correlation functions of any rank is developed and details for rank L = 1 and 2 are given. The scheme provides a transparent way for identifying deviations from simple Markovian dynamics as observed, e.g., in complex liquids close to the glass transition. The method should be applicable to NMR and optical multiple-pulse techniques as well as to photon correlation spectroscopy. Results are given for 2H-NMR multiple-pulse data in supercooled glycerol. We identify and analyze the dynamical heterogeneity of molecular reorientation in a range of 205 − 215 K close to the glass temperature Tg = 190 K.

yearjournalcountryeditionlanguage
1998-12-01Europhysics Letters (EPL)
https://doi.org/10.1209/epl/i1998-00510-7