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  4. Dynamics and critical damping of capillary waves in an ionic liquid
 
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Dynamics and critical damping of capillary waves in an ionic liquid

Publikationstyp
Journal Article
Date Issued
2008-06-03
Sprache
English
Author(s)
Sloutskin, Eli  
Huber, Patrick  orcid-logo
Wolff, Matthias  
Ocko, Benjamin M.  
Madsen, Anders  
Sprung, Michael  
Schön, Volker  
Baumert, Julian  
Deutsch, Moshe  
TORE-URI
http://hdl.handle.net/11420/13005
Journal
Physical review E - Statistical, Nonlinear, and Soft Matter Physics  
Volume
77
Issue
6
Article Number
060601
Citation
Physical Review E 77 (6): 060601 (2008)
Publisher DOI
10.1103/PhysRevE.77.060601
Publisher
American Physical Society
The dynamics of thermal capillary waves (CWs) on an ionic liquid's surface are studied at the transition from propagating to overdamped CWs by x-ray photon correlation spectroscopy. The analysis considers both homodyne and heterodyne contributions, and yields excellent full line-shape experiment-theory agreement for the structure factor. The CWs' Brillouin scattering becomes extinct at a critical temperature Tc JK ∼10 K above Tc LL, the propagating modes' hydrodynamic limit, in agreement with linear response theory. Surprisingly, the same power law applies at both Tc. The results rule out the presence of a suggested surface dipole layer.
DDC Class
530: Physik
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