“Ising nematic quantum critical point in a metal: a Monte Carlo study” by Samuel Lederer (MIT)

Wednesday, March 9, 2016 - 4:00pm
Condensed Matter Physics Journal club Seminar

The Ising nematic quantum critical point (QCP) associated with the zero temperature transition from a symmetric to a nematic metal is an exemplar of metallic quantum criticality. We have carried out a minus sign-free quantum Monte Carlo study of this QCP for a two dimensional lattice model with sizes up to 24 × 24 sites. The nematic boson propagator exhibits scaling behavior over the accessible ranges of temperature, (imaginary) time, and distance. This scaling behavior has remarkable similarities with recently measured properties of the Fe-based superconductors proximate to their putative nematic QCP. For sufficiently strong coupling between the fermions and the nematic bosons, high temperature s-wave superconductivity emerges near the QCP, condensing out of a normal state largely devoid of coherent quasiparticles.

PAB 4-330