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CALSCALE:GREGORIAN
X-WR-CALNAME:Flatband\, magnetism and superconductivity in twisted trilayer
  graphene
X-WR-TIMEZONE:Eastern Time (US & Canada)
BEGIN:VEVENT
DTSTAMP:20260912T223510Z
UID:tag:localist.com\,2008:EventInstance_39192980220721
DTSTART:20220223T183000Z
DTEND:20220223T193000Z
DESCRIPTION:Register Here:\nhttps://harvard.zoom.us/webinar/register/WN_q8r
 I_YJWS2GiLNyxVADNKA\n\nWhen layers of graphene are rotationally misaligned
  by the magic angle\, the moiré superlattice features extremely flat band
 s. Due to the enhanced density of states\, Coulomb interaction induces a v
 ariety of instabilities\, such as correlated insulators and orbital ferrom
 agnetism. The most prominent occurs at integer filling and are therefore c
 ommonly attributed to spontaneous polarization of the moiré unit cell’s
  `flavor' degrees of freedom---spin\, valley\, and the flat-band degenerac
 y. Flavor polarization at integer filling is thought to crucially determin
 e further instabilities at lower energy scales\, such as superconductivity
  and weaker incompressible states at fractional filling. In this talk\, I 
 will examine the unique role of flavor polarization in twisted trilayer gr
 aphene and its influence on the interplay between moiré flatband\, Coulom
 b interaction\, superconductivity\, and ferromagnetism. I will show that s
 uch interplay can be modified by tuning experimental knobs including twist
  angle and proximity effect. Our findings also shed new light on the origi
 n of quantum phenomena such as superconductivity at low temperature and th
 e strange metal phase at high temperature.
LOCATION:
SUMMARY:Flatband\, magnetism and superconductivity in twisted trilayer grap
 hene
URL;VALUE=URI:https://events.seas.harvard.edu/event/flatband_magnetism_and_
 superconductivity_in_twisted_trilayer_graphene
CATEGORIES:Colloquia / Seminar / Lecture
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