BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:A dynamical transition in oscillating crystals - Francesco Turci\,
  Bristol
DTSTART:20200128T130000Z
DTEND:20200128T140000Z
UID:TALK136339@talks.cam.ac.uk
CONTACT:Professor Mike Cates
DESCRIPTION:Rigidity is the hallmark of solids. It manifests itself as a r
 esistance to flow: for small applied strain\,\nsolids provide an elastic\,
  restoring\, reversible response\, as opposed to liquids. However\, for la
 rge enough\nstrain\, irreversible plastic flow occurs at the so-called yie
 lding point. Recently\, yielding of crystals has\nbeen rationalised within
  a nucleation framework\, suggesting that a rigid solid is always metastab
 le to an\ninfinitesimal deformation [1]. I shall revisit these topics pres
 enting a recent numerical work exploring the\nmetastability of oscillatory
  sheared crystals in three dimensions [2]. The main finding is that a tran
 sition\nfrom a reversible to an irreversible driving regime occurs and tha
 t it is affected by the specific\ncomposition and structure of the crystal
 . For a large enough oscillation frequency\, a yielding pattern\nreminisce
 nt of spinodal decomposition emerges\, consistent with the recent nucleati
 on scenarii.\n\n[1] P. Nath et al. PNAS 115\, E4322 (2018)\n[2] É. Brilla
 ux and F. Turci\, Soft Matter 15\, 4371 (2019)
LOCATION:MR11\, CMS
END:VEVENT
END:VCALENDAR