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TZID:Europe/Paris
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BEGIN:VEVENT
UID:1-215@lptms.universite-paris-saclay.fr
DTSTART:20140121T110000Z
DTEND:20140121T120000Z
DTSTAMP:20140116T115530Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-julia-meyer/
SUMMARY:Séminaire du LPTMS: Julia Meyer - LPTMS\, salle 201\, 2ème étage
 \, Bât 100\, Campus d'Orsay - 21 Jan 14 11:00
DESCRIPTION:Disordered topological metals\nJulia Meyer (CEA Grenoble)\nTopo
 logical behavior can be masked when disorder is present. A topological ins
 ulator\, either intrinsic or interaction induced\, may turn gapless when s
 ufficiently disordered. Nevertheless\, the metallic phase that emerges onc
 e a topological gap closes retains several topological characteristics. By
  considering the self-consistent disorder-averaged Green function of a top
 ological insulator\, we derive the condition for gaplessness. We show that
  the edge states survive in the gapless phase as edge resonances and that\
 , similar to a doped topological insulator\, the disordered topological me
 tal also has a finite\, but non-quantized topological index. We then consi
 der the disordered Mott topological insulator. We show that within mean-fi
 eld theory\, the disordered Mott topological insulator admits a phase wher
 e the symmetry-breaking order parameter remains non-zero but the gap is cl
 osed\, in complete analogy to 'gapless superconductivity' due to magnetic 
 disorder.
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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