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High Tc superconductivity and non-Fermi liquid behavior near a nematic quantum critical point: a Monte Carlo study

October 4, 2016 -
11:00am to 12:00pm
Speaker: 
Samuel Lederer
Institution: 
MIT

The Ising nematic quantum critical point (QCP) associated with the breaking of fourfold rotational symmetry in a zero temperature 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. For sufficiently strong coupling between the fermions and the nematic bosons, high temperature superconductivity emerges near the QCP. This superconductivity condenses out of a metallic normal state with a large, temperature independent single-fermion scattering rate, and with transport properties inconsistent with Fermi liquid theory. Time permitting, I will discuss implications of these results for cuprate strange metal phenomenology, and for the field theory of quantum critical metals.

Hosted by Dong-Ling Deng.

2205 John S. Toll Physics Building