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Specific heat releated to details of the vibrational modes for a 2D nanocrystalline material

Wolfgang Hahn 

Polish Academy of Sciences, High Pressure Research Center (UNIPRESS), Sokolowska 29/37, Warszawa 01-142, Poland


The relationship between specific heat and details of the vibrational modes of a twodimensional nanocrystalline model material (NCM) as a function of grain size and temperature has been investigated. The specific heat of the NCM was raised respective to that of a single crystal in the temperature range of about 28 K. This raise could be related to differences in the occupation of vibrational modes: The VDOS was subdivided in subspectra by means of the participation ratio (PR), which measures the fraction of the atoms contributing effectively to a given mode. The differences in the specific heat could be largely attributed to parts of such a subspectrum.


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Presentation: poster at E-MRS Fall Meeting 2004, Symposium H, by Wolfgang Hahn
See On-line Journal of E-MRS Fall Meeting 2004

Submitted: 2004-07-12 19:35
Revised:   2009-06-08 12:55