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UID:1-312@lptms.universite-paris-saclay.fr
DTSTART:20141128T113000Z
DTEND:20141128T123000Z
DTSTAMP:20141124T065724Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/journal-club-clel
 ia-de-mulatier-2/
SUMMARY:Journal-club : Haggai Landa - LPTMS\, salle 201\, 2ème étage\, B
 ât 100\, Campus d'Orsay - 28 Nov 14 11:30
DESCRIPTION:Nanofriction in cold ion traps\, A. Benassi\, A. Vanossi\, E. T
 osatti\, Nature Communications 2\, 236 (2011)\nHaggai Landa\nSliding frict
 ion between crystal lattices and the physics of cold ion traps are so far 
 non-overlapping fields. Two sliding lattices may either stick and show sta
 tic friction or slip with dynamic friction\; cold ions are known to form s
 tatic chains\, helices or clusters\, depending on the trapping conditions.
  Here we show\, based on simulations\, that much could be learnt about fri
 ction by sliding\, through\, for example\, an electric field\, the trapped
  ion chains over a corrugated potential. Unlike infinite chains\, in which
  the theoretically predicted Aubry transition to free sliding may take pla
 ce\, trapped chains are always pinned. Yet\, a properly defined static fri
 ction still vanishes Aubry-like at a symmetric–asymmetric structural tra
 nsition\, found for decreasing corrugation in both straight and zig-zag tr
 apped chains. Dynamic friction is also accessible in ringdown oscillations
  of the ion trap. Long theorized static and dynamic one-dimensional fricti
 on phenomena could thus become accessible in future cold ion tribology.
LOCATION:LPTMS\, salle 201\, 2ème étage\, Bât 100\, Campus d'Orsay\, 15 
 Rue Georges Clemenceau\, Orsay\, 91405\, France
GEO:48.698185;2.181768
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  Orsay\, 91405\, France;X-APPLE-RADIUS=100;X-TITLE=LPTMS\, salle 201\, 2è
 me étage\, Bât 100\, Campus d'Orsay:geo:48.698185,2.181768
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