Document Detail

Self-consistent interpretation of the 2D structure of the liquid Au82Si18 surface: bending rigidity and the Debye-Waller effect.
MedLine Citation:
PMID:  21231117     Owner:  NLM     Status:  In-Process    
The structural and mechanical properties of 2D crystalline surface phases that form at the surface of liquid eutectic Au82Si18 are studied using synchrotron x-ray scattering over a large temperature range. In the vicinity of the eutectic temperature the surface consists of a 2D atomic bilayer crystalline phase that transforms into a 2D monolayer crystalline phase during heating. The latter phase eventually melts into a liquidlike surface on further heating. We demonstrate that the short wavelength capillary wave fluctuations are suppressed due to the bending rigidity of 2D crystalline phases. The corresponding reduction in the Debye-Waller factor allows for measured reflectivity to be explained in terms of an electron density profile that is consistent with the 2D surface crystals.
S Mechler; P S Pershan; E Yahel; S E Stoltz; O G Shpyrko; B Lin; M Meron; S Sellner
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Publication Detail:
Type:  Journal Article     Date:  2010-10-27
Journal Detail:
Title:  Physical review letters     Volume:  105     ISSN:  1079-7114     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2010 Oct 
Date Detail:
Created Date:  2011-01-14     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  186101     Citation Subset:  -    
Department of Physics and SEAS, Harvard University, Cambridge, Massachusetts 02138, USA.
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