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SUMMARY:Twist and Texture in Bilayer Graphene
DTSTART:20141031T141500
DTSTAMP:20260510T085151Z
UID:cde6f9b3f9d17e862691c35fcd48e3413c4b89a94f2cd00584e98c32
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Eugene Mele\, Department of Physics\, David Rittenhouse 
 Labs\, University of Pennsylvania\nMultilayer graphenes feature special fu
 nctionalities that microscopically arise from the atomic registry when gra
 phene sheets are stacked. These depend on relative lateral translations\, 
 rotations and layer symmetry breaking that can occur spontaneously or be i
 nduced. This talk will focus on bilayer graphenes (BLG) in which the stack
 ing arrangement varies in space. We examine domain walls where the local s
 tacking order switches from local AB to BA registry\, and study the electr
 onic modes at the boundary by analyzing their four band continuum models a
 ugmented by numerical calculations on the lattice.  We then consider the 
 more general family of two dimensional strain-minimizing BLG stacking text
 ures\, showing that they are twisted textures of the interlayer displaceme
 nt field. We study the interactions and composition rules for these elemen
 tary textures which permit a unified treatment of stacking point defects\,
  domain walls and twisted graphenes.\nBio: Associate Chair for Undergradua
 te Affairs\, Department of Physics\, University of Pennsylvania (1998- 200
 2)\nProfessor of Physics\, University of Pennsylvania (since 1989)\nAssoci
 ate Professor of Physics\, University of Pennsylvania (1985-1989)\nAssista
 nt Professor of Physics\, University of Pennsylvania (1981-1985)\nAssociat
 e Scientist\, Xerox Webster Research Center\, Webster\, NY (1978-1981)\nPo
 stdoctoral Associate\, Department of Physics\, Massachusetts Institute of 
 Technology (1978)\nResearch Assistant\, Department of Physics\, Massachuse
 tts Institute of Technology (1975-1978)\nHonors include:\nEurophysics Priz
 e of the European Physical Society (2010)\nChristian R. and Mary F. Lindba
 ck Award for Distinguished Teaching\, University of Pennsylvania (2010)\nF
 ellow of the American Physical Society (2001)\nIra Abrams Award for Distin
 guished Teaching\, School of Arts and Sciences\, University of Pennsylvani
 a (1998)\nAlfred P. Sloan Fellow (1983-1987)\nNational Science Foundation 
 Graduate Fellow (1972-1975)
LOCATION:PH L1 503 (Aquarium) http://plan.epfl.ch/?room=PHL1503
STATUS:CONFIRMED
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