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Instabilities of 2d quantum critical metals in the Nf->0 limit
  Condensed Matter seminars

Tuesday 06 February 2018
from 11:00 to 12:00
at 112:028 (Nordita South)
Speaker : Petter S├Ąterskog (Nordita)
Abstract : We study a Fermi surface coupled to fluctuations of a critical order parameter in 1+2 dimensions. The limit of vanishing fermion flavors gives a controlled way of studying this strongly coupled theory. We show how to calculate low-energy fermion n-point functions. We find that certain four-fermion correlators grow exponentially with spatial separation indicating that these theories have an instability in the limit of 0 fermion flavors. We show that these instabilities survive when some of the Nf corrections are added.

AlbaNova  | Last modified 05 February 2018 15:55  |  HELP