6533b827fe1ef96bd12867f5
RESEARCH PRODUCT
Dynamical precursor of nematic order in a dense fluid of hard ellipsoids of revolution
Michael P. AllenArnulf LatzMartin LetzTh. TheenhausRolf Schillingsubject
PhysicsRange (particle radiation)Condensed matter physicsRelaxation (NMR)BiophysicsComplex systemFOS: Physical sciencesSurfaces and InterfacesGeneral ChemistryDisordered Systems and Neural Networks (cond-mat.dis-nn)Condensed Matter - Disordered Systems and Neural NetworksCondensed Matter - Soft Condensed MatterSpectral lineMolecular dynamicsLiquid crystalMode couplingSoft Condensed Matter (cond-mat.soft)General Materials ScienceSoft matterBiotechnologydescription
We investigate hard ellipsoids of revolution in a parameter regime where no long range nematic order is present but already finite size domains are formed which show orientational order. Domain formation leads to a substantial slowing down of a collective rotational mode which separates well from the usual microscopic frequency regime. A dynamic coupling of this particular mode into all other modes provides a general mechanism which explains an excess peak in spectra of molecular fluids. Using molecular dynamics simulation on up to 4096 particles and on solving the molecular mode coupling equation we investigate dynamic properties of the peak and prove its orientational origin.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2004-03-11 |