Strange metallicity and Planckian dissipation due to a heavy Fermion quantum critical point

I present a cellular dynamical mean-field theory (CDMFT) plus Numerical Renormalization Group approach to study quantum criticality in the periodic Anderson model (PAM). The CDMFT phase diagram of the PAM contains a Kondo breakdown (KB) quantum critical point (QCP). At zero temperature, this KB-QCP marks a continuous transition between two Fermi liquid phases, which differ in their Fermi surface volumes. At non-zero temperatures in the vicinity of the QCP, we find a non-Fermi liquid regime that features strange metal like features such as a linear-in-T resistivity, dynamical scaling, and a logarithmic temperature dependence of the Sommerfeld coefficient. I discuss the properties of this non-Fermi-liquid regime and also show that vertex contributions to the current response are qualitatively important to capture the correct frequency and temperature dependence of the optical conductivity.