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TZID:Europe/Paris
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BEGIN:VEVENT
UID:1-463@lptms.universite-paris-saclay.fr
DTSTART:20161013T110000Z
DTEND:20161013T120000Z
DTSTAMP:20160919T071108Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-peter-karpov-seminaire-exceptionnel/
SUMMARY:Séminaire du LPTMS: Peter Karpov  *** séminaire exceptionnel *** 
 - LPTMS\, salle 201\, 2ème étage\, Bât 100\, Campus d'Orsay - 13 Oct 16
  11:00
DESCRIPTION:Modeling of phase transitions and patterns formation in ensembl
 es of solitons\nPeter Karpov (National University of Science and technolog
 y "MISiS"\, Moscow\, Russia)\nVulnerability of broken symmetries of cooper
 ative electronic states gives rise to topological defects like electronic 
 vortices\, walls\, stripes. A typical quasi-one-dimensional architecture b
 rings these objects to the microscopic scale giving rise to solitons as el
 ementary particles taking from electrons their major roles as carriers of 
 charge or spin. Because of the long-range ordering\, the solitons experien
 ce unusual super-long-range forces leading to a sequence of phase transiti
 ons in their ensembles: the higher-temperature transition of the confineme
 nt and the lower one of aggregation into macroscopic walls.\n\nIn this tal
 k I shall review the available analytical theory and present the recent re
 sults of an extensive numerical modeling for ensembles of both neutral and
  charged solitons in two- and three-dimensional systems. We suggest a spec
 ific Monte Carlo algorithm preserving the number of solitons\, which subst
 antially facilitates the calculations\, allows to extend them to the three
 -dimensional case and to include the important long-range Coulomb interact
 ions. The results confirm the first confinement transition\, except for a 
 very strong Coulomb repulsion\, and demonstrate a pattern formation at the
  second transition of aggregation.\n\n&nbsp\;\n\nReference: P. Karpov and 
 S. Brazovskii\, PRB 94\, 125108 (2016).
CATEGORIES:seminars
LOCATION:LPTMS\, salle 201\, 2ème étage\, Bât 100\, Campus d'Orsay\, 15 
 Rue Georges Clemenceau\, Orsay\, 91405\, France
GEO:48.698185;2.181768
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=15 Rue Georges Clemenceau\,
  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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