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SUMMARY:Many-body interaction effects in Dirac-Weyl semimetals - Edwin Bar
 nes\, Virginia  Tech
DTSTART:20160526T131500Z
DTEND:20160526T141500Z
UID:TALK64193@talks.cam.ac.uk
CONTACT:Dr G Moller
DESCRIPTION:Dirac materials have been at the forefront of condensed matter
  research over the past decade following breakthroughs in graphene transpo
 rt experiments. The relativistic-like linear dispersion of quasiparticles 
 near the Dirac point leads to a variety of intriguing phenomena\, among wh
 ich are many-body interaction effects that both resemble and strongly cont
 rast with quantum electrodynamics. Most notably\, graphene experiments hav
 e revealed a strong Dirac cone squeezing effect due to electron-electron i
 nteractions. This and related phenomena can arise not only in graphene\, b
 ut also in three-dimensional Dirac-Weyl semimetals\, albeit with many qual
 itative differences due to the renormalization of both charge and Fermi ve
 locity in three dimensions. I will describe our efforts to develop a quant
 itative and predictive theory of many-body phenomena in both graphene and 
 Dirac-Weyl semimetals. 
LOCATION:TCM Seminar Room\, Cavendish Laboratory
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