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SUMMARY:Phonon traces and quasilocalized vibrations in vitreous silica - D
 r Nikita Shcheblanov\, Université Gustave Eiffel and LIGO-Virgo collabora
 tion
DTSTART:20221024T133000Z
DTEND:20221024T140000Z
UID:TALK182084@talks.cam.ac.uk
CONTACT:Dr M. Simoncelli
DESCRIPTION:In network glasses\, crystalline order is lost but the short a
 nd midrange order survives in the form of the same atomic structural build
 ing blocks (units) present both in glasses and in corresponding crystals s
 o that the vibrational motion of those might share some similarity. In the
  absence of a direct comparative analysis of vibrations in glasses and cry
 stals\, the following general questions remained unclear: (i) Do glassy vi
 brations in different frequency ranges resemble (originate from) phonons i
 n corresponding crystals? (ii) If yes\, then what are their frequency-freq
 uency correlations\, and what are the typical length scales on which the v
 ibrations are similar? (iii) What is the role of different types of disord
 er in the formation of the vibrational spectrum of glasses? The proposed t
 alk will be devoted to answering these questions\, as well as some points 
 related to mode localization.\n\n\nZoom link:\nhttps://zoom.us/j/924479820
 65?pwd=RkhaYkM5VTZPZ3pYSHptUXlRSkppQT09
LOCATION:Zoom
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