We compare the atomic dynamics of the glass to that of the relevant crystal. In the spectra of inelastic scattering, the boson peak of the glass appears higher than the transverse acoustic (TA) singularity of the crystal. However, the density of states shows that they have the same number of states. Increasing pressure causes the transformation of the boson peak of the glass towards the TA singularity of the crystal. Once corrected for the difference in the elastic medium, the boson peak matches the TA singularity in energy and height. This suggests the identical nature of the two features.

Equivalence of the boson peak in glasses to the transverse acoustic van Hove singularity in crystals

Monaco, Giulio;
2011

Abstract

We compare the atomic dynamics of the glass to that of the relevant crystal. In the spectra of inelastic scattering, the boson peak of the glass appears higher than the transverse acoustic (TA) singularity of the crystal. However, the density of states shows that they have the same number of states. Increasing pressure causes the transformation of the boson peak of the glass towards the TA singularity of the crystal. Once corrected for the difference in the elastic medium, the boson peak matches the TA singularity in energy and height. This suggests the identical nature of the two features.
A. I., Chumakov; Monaco, Giulio; A., Monaco; W. A., Crichton; A., Bosak; R., Ruffer; A. Meyer, F. Kargl; L., Comez; D., Fioretto; H., Giefers; S., Roitsch; G., Wortmann; M. H., Manghnani; A., Hushur; Q., Williams; J., Balogh; K., Parlinski; P., Jochym; P., Piekarz
File in questo prodotto:
File Dimensione Formato  
Chumakov_11_PRL.pdf

Solo gestori archivio

Tipologia: Versione editoriale (Publisher’s layout)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 1.49 MB
Formato Adobe PDF
1.49 MB Adobe PDF   Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11572/101137
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 198
  • ???jsp.display-item.citation.isi??? 194
social impact