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BEGIN:VEVENT
DTSTAMP:20261027T032614Z
LAST-MODIFIED:20190122T154151Z
DTSTART:20190130T210000Z
DTEND:20190130T220000Z
UID:event2070@bu.edu
URL:http://physics.bu.edu/internal/events/show/2070
SUMMARY:How to Understand the Magic of Twisted Bilayer Graphene
DESCRIPTION:Featuring Noah F. Q. Yuan\, MIT\nHosted by: Zhicheng Yang\n\nPa
	rt of the Biophysics/Condensed Matter Seminar Series.\n\nTwo layers of grap
	hene rotated with respect to each other will form the twisted bilayer graph
	ene (TBG). A year ago\, Pablo Jarillo-Herrero’s group at MIT found that T
	BG at the so-called "magic angle" could become superconducting and insulati
	ng. Since then\, more experimental data are accumulated. In this talk\, I w
	ill try to understand how superconductivity and insulating phase emerge in 
	TBG at magic angle. Through weak coupling approach\, the so-called high-ord
	er van Hove singularity (VHS) is found near magic angle\, which would lead 
	to unconventional superconductivity and density wave phases in the presence
	 of Coulomb repulsion. Through strong coupling approach\, the Wannier orbit
	als are obtained for magic angle TBG\, whose nontrivial shape induces the e
	xotic effective tight-binding model and extended Hubbard model.
LOCATION:SCI 328\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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