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SUMMARY:Magic Angle Graphene: a New Platform for Strongly Correlated Physi
 cs
DTSTART:20200203T141500
DTEND:20200203T151500
DTSTAMP:20260407T064052Z
UID:eda14c7f08a98fe0f57f657e44d45e5e2e20e35de626fe7583580a58
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Pablo Jarillo-Herrero\, MIT\nThe understanding of strong
 ly-correlated quantum matter has challenged physicists for decades. Such d
 ifficulties have stimulated new research paradigms\, such as ultra-cold at
 om lattices for simulating quantum materials. In this talk I will present 
 a new platform to investigate strongly correlated physics\, based on graph
 ene moiré superlattices. In particular\,\nI will show that when two graph
 ene sheets are twisted by an angle close to the theoretically predicted 
 ‘magic angle’\, the resulting flat band structure near the Dirac point
  gives rise to a strongly-correlated electronic system. These flat bands e
 xhibit half-filling insulating phases at zero magnetic field\, which we sh
 ow to be a correlated insulator arising from electrons localized in the mo
 iré superlattice. Moreover\, upon doping\, we find electrically tunable s
 uperconductivity in this system\, with many characteristics similar to hig
 h-temperature cuprates superconductivity. These unique properties of magic
 -angle twisted bilayer graphene open up a new playground for exotic many-b
 ody quantum phases in a 2D platform made of pure carbon and without magnet
 ic field. The easy accessibility of the flat bands\, the electrical tunabi
 lity\, and the bandwidth tunability though twist angle may pave the way to
 wards more exotic correlated systems\, such as quantum spin liquids or cor
 related topological insulators.\n 
LOCATION:CE 1 3 https://plan.epfl.ch/?room==CE%201%203
STATUS:CANCELLED
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