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SUMMARY:Will Silicene or Germanene or Stanene be the Next Silicon?
DTSTART:20160331T151500
DTSTAMP:20260405T193122Z
UID:e94ded323e5636612dd2e2515925188cb382c834c7a72f079f24a6a7
CATEGORIES:Conferences - Seminars
DESCRIPTION:Guy LE LAY\nAix-Marseille University\, UMR 7345 - Laboratoire 
 PIIM\nAmong the 10  Fronts in Physics identified by Thomson Reuters for t
 he years 2011-2014 “Silicene growth and properties” is number 4  afte
 r “Observation of Higgs boson”\, “Globalneutrino data analysis” an
 d “Nonlinear massive gravity” [1].\nSilicene is a novel two-dimensiona
 l (2D) honeycomb allotrope of silicon with a significant spin-orbit coupli
 ng (SOC)\, born in 2012 [2]. Germanene and stanene\, his germanium and tin
  cousins\, recently synthesized\, are also attracting considerable interes
 t [3\,4].  These three group IV graphene like elemental materials are 2D 
 Topological Insulators and are directly compatible with the advanced Si el
 ectronic technologies\nAt variance with graphene\, which descents from gra
 phite\, they are artificially created since they have no parent crystal in
  nature. They appear as emerging 2D electronic materials and are considere
 d as  promising candidates for ultimate scaling of nanoelectronic devices
 . Indeed\, the recent fabrication of the first silicene field effect trans
 istors operating at room temperature demonstrates their potential [5].\nIn
  this seminar\, I will first present the seminal 3´3 silicene phase forme
 d on a silver (111) substrate [2]\, its sister phases\, its functionalizat
 ion\, and the growth and electronic properties of multi layer silicene\, a
  Dirac material stable in ambient air\, protected by its ultra-thin native
  oxide [6].\nFinally\, the recent synthesis of single and multi layer germ
 anene on gold (111) templates\, will be addressed [3\,7]\, along with ment
 ion of first results on stanene [4].\nThese novel 2D materials are expecte
 d to be outstanding platforms for innovative properties\, especially to ob
 serve the quantum spin Hall effect at room temperature.\nREFERENCES\n1. C.
  Day\, Physics Today\, 25 September 2015.\n2. P. Vogt et al.\, Phys. Rev. 
 Lett.\, 108\, 155501 (2012).\n3. M.E. Dávila et al.\, New J. Phys.\, 16\,
  095002 (2014).\n4. Y. Fujii \, J. Yuhara \, K. Soda \, M. Nakatake\, L. X
 ian\, Angel Rubio and G. Le Lay\, to be published.\n5. Tao et al.\, Nature
  Nanotechnol.\, 10\, 227 (2015)\n6. P. De Padova et al.\, 2D Mater.\, 1\, 
 021003 (2014).\n7. M. E. Dávila and G. Le Lay\, Sci. Rep.\, 6\, 20714 (20
 16).
LOCATION:PH-L1 503 
STATUS:CONFIRMED
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