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DTSTART:20220327T030000
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DTSTART:20211031T020000
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DTSTAMP:20260405T153413Z
UID:6155831b8c816018224206@ist.ac.at
DTSTART:20211102T110000
DTEND:20211102T120000
DESCRIPTION:Speaker: Areg Ghazaryan\nhosted by Maksym Serbyn\nAbstract: Twi
 sted bilayer graphene has emerged as an incredible system where energy ban
 ds can be made effectively flat by tuning the twist angle.This resulted in
  observation of symmetry broken phases and superconductivity in twisted gr
 aphene systems. Unfortunately the band structure of those systems is quite
  cumbersome and hard to analyze theoretically for interaction effects. It 
 turns out similar experimental signatures can be obtained even when the ba
 nd is not completely flat\, but the bandwidth is reduced considerably for 
 a large range of momenta.This can be achieved by just stacking three layer
 s of graphene in rhombohedral configuration. In this talk I will present t
 he recent observation of magnetism and superconductivity in trilayer rhomb
 ohedral (ABC) graphene. I will show that a simple Stoner model is capable 
 of capturing the main features of the interacting phase diagram. Finally\,
  I will also discuss the possible origin of the superconductivity based on
  the Kohn-Luttinger mechanism\, which only relies on electron-electron int
 eraction and does not require the presence of phonons as mediators of the 
 Cooper pairs.
LOCATION:Heinzel Seminar Room / Office Bldg West (I21.EG.101)\, ISTA
ORGANIZER:cpetz@ist.ac.at
SUMMARY:Areg Ghazaryan: Magnetism and superconductivity in rhombohedral tri
 layer graphene
URL:https://talks-calendar.ista.ac.at/events/3359
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