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SUMMARY:A gapless 1D spin liquid as a critical point between fragile Kondo
  insulators - Nick Bultnick\, University of Ghent
DTSTART:20241114T140000Z
DTEND:20241114T153000Z
UID:TALK219844@talks.cam.ac.uk
CONTACT:Gaurav
DESCRIPTION:Kondo insulators acquire their incompressible character via a 
 spin exchange coupling between itinerant charge carriers and local moments
 . Motivated by recent advances in tunable 2D materials\, I will focus on a
  class of Kondo insulator models where both the bandwidth and the quantum 
 geometry of the itinerant electrons can be tuned. I will then argue that a
 lready in the simplest such model interesting physics arises. In particul
 ar\, I will present evidence that in a 1D model tuning the kinetic energy
  of the itinerant electrons drives a second order phase transition where t
 he critical fluctuations are carried by the spin degrees of freedom. Moreo
 ver\, the transition falls outside the usual Landau paradigm for symmetry-
 breaking transitions\, and has connections to generalized Lieb-Schultz-Mat
 tis obstructions.
LOCATION:TCM Seminar Room
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