Ergodic to Nonergodic Transition in Liquids with a Local Order: The Case of m-Toluidine
Academic Article
Publication Date:
2005
abstract:
The dynamic structure factor of m-toluidine has been measured by inelastic x-ray scattering in the
mesoscopic Q range between 1 and 10 nm-1, where a prepeak is revealed in the static structure factor
resulting from the existence of hydrogen bonded, nanometer size clusters. Evidence is given of (i) a
square-root cusp in the nonergodicity factor and of (ii) critical nonergodicity parameters which oscillate in
phase with the static structure factor. These results demonstrate that local order in a liquid can coexist with
the signatures of the ergodic to nonergodic transition predicted by the mode coupling theory for simple,
dense liquids.
mesoscopic Q range between 1 and 10 nm-1, where a prepeak is revealed in the static structure factor
resulting from the existence of hydrogen bonded, nanometer size clusters. Evidence is given of (i) a
square-root cusp in the nonergodicity factor and of (ii) critical nonergodicity parameters which oscillate in
phase with the static structure factor. These results demonstrate that local order in a liquid can coexist with
the signatures of the ergodic to nonergodic transition predicted by the mode coupling theory for simple,
dense liquids.
Iris type:
01.01 Articolo in rivista
List of contributors:
Comez, Lucia
Published in: