Eur. Phys. J. B 1, 169-172 (1998)
https://doi.org/10.1007/s100510050167

Mode-coupling crossover in viscous toluene revealed by neutron and light scattering

¹ Physik-Department, Technische Universität München, 85747 Garching, Germany
² Physikalische Chemie, Universität Mainz, 55099 Mainz, Germany
³ Institut Laue-Langevin, 38042 Grenoble Cedex, France
⁴ Fachbereich Physik, Universität Dortmund, 44221 Dortmund, Germany
⁵ Laboratoire Léon Brillouin, CEA, CEN-Saclay, 91191 Gif-sur-Yvette Cedex, France

Corresponding author: ^a jwuttke@physik.tu-muenchen.de

Received: 20 June 1997
Accepted: 3 November 1997
Published online: 15 January 1998

Abstract

The dynamics of supercooled toluene, studied in a GHz–THz range by incoherent neutron and depolarized light scattering, is found to be in full accord with mode coupling predictions. Around the susceptibility minimum, neutron spectra are wavenumber independent and proportional to light scattering data; the fast β-relaxation scaling law applies; amplitude and frequency diverge with power laws that extrapolate towards a crossover temperature T_c = 143 K.