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DTSTAMP:20260919T213125Z
LAST-MODIFIED:20190122T155606Z
DTSTART:20190129T203000Z
DTEND:20190129T213000Z
UID:event1989@bu.edu
URL:http://physics.bu.edu/internal/events/show/1989
SUMMARY:Magic Angle Graphene: a New Platform for Strongly Correlated Physic
	s
DESCRIPTION:Featuring Pablo Jarillo-Herrero\, MIT\nHosted by: Maria Kamenet
	ska\nPoster: http://physics.bu.edu/internal//files/download/Jarillo-Herrero
	-poster.pdf\n\nPart of the Physics Department Colloquia Series.\n\nThe unde
	rstanding of strongly-correlated quantum matter has challenged physicists f
	or decades. Such difficulties have stimulated new research paradigms\, such
	 as ultra-cold atom lattices for simulating quantum materials. In this talk
	 I will present a new platform to investigate strongly correlated physics\,
	 based on graphene moiré superlattices. In particular\, I will show that w
	hen two graphene sheets are twisted by an angle close to the theoretically 
	predicted ‘magic angle’\, the resulting flat band structure near the Di
	rac point gives rise to a strongly-correlated electronic system. These flat
	 bands exhibit half-filling insulating phases at zero magnetic field\, whic
	h we show to be a correlated insulator arising from electrons localized in 
	the moiré superlattice. Moreover\, upon doping\, we find electrically tuna
	ble superconductivity in this system\, with many characteristics similar to
	 high-temperature cuprates superconductivity. These unique properties of ma
	gic-angle twisted bilayer graphene open up a new playground for exotic many
	-body quantum phases in a 2D platform made of pure carbon and without magne
	tic field. The easy accessibility of the flat bands\, the electrical tunabi
	lity\, and the bandwidth tunability though twist angle may pave the way tow
	ards more exotic correlated systems\, such as quantum spin liquids or corre
	lated topological insulators.
LOCATION:SCI 109\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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