title: Excess wing in glass-forming glycerol and LiCl-glycerol mixtures detected by neutron scattering.
abstract: The relaxational dynamics in glass-forming glycerol and glycerol mixed with LiCl is investigated using different neutron scattering techniques. The performed neutron spin echo experiments, which extend up to relatively long relaxation time scales of the order of 10 ns, should allow for the detection of contributions from the so-called excess wing. This phenomenon, whose microscopic origin is controversially discussed, arises in a variety of glass formers and, until now, was almost exclusively investigated by dielectric spectroscopy and light scattering. Here we show that the relaxational process causing the excess wing can also be detected by neutron scattering, which directly couples to density fluctuations.
authors.affiliation: Jülich Centre for Neutron Science JCNS, Forschungszentrum Jülich GmbH, Outstation at SNS-Oak Ridge National Laboratory (ORNL), 1 Bethel Valley Road, 37831, Oak Ridge, TN, USA, s.gupta@fz-juelich.de.
authors.forename: S
authors.initials: S
authors.lastname: Gupta
authors.forename: N
authors.initials: N
authors.lastname: Arend
authors.forename: P
authors.initials: P
authors.lastname: Lunkenheimer
authors.forename: A
authors.initials: A
authors.lastname: Loidl
authors.forename: L
authors.initials: L
authors.lastname: Stingaciu
authors.forename: N
authors.initials: N
authors.lastname: Jalarvo
authors.forename: E
authors.initials: E
authors.lastname: Mamontov
authors.forename: M
authors.initials: M
authors.lastname: Ohl