ESPCI web site
September 18 at 2:00 pm (Paris time)
Room Boreau, building C, 2nd floor, 10 rue Vauquelin, ESPCI
A minimal description of strange metals
After reviewing recent exact numerical results on the transport and optical response of the t-J and Hubbard models, I will introduce a phenomenological theory of transport and optical properties of quantum materials that implements the Kubo formula starting from a minimal, physically motivated assumption on the motion of the charge carriers. In bad metals, where wave-like coherence is lost at each hop between neighboring atoms, this immediately leads to T-linear resistivities with apparently Planckian scattering rates. The theory also explains omega/T scaling, stretched Drude peaks and displaced Drude peaks that are commonly observed in optical absorption experiments in strange metals. I will briefly discuss direct consequences regarding the RIXS and M-EELS spectra in the cuprates, as well as broader implications of the present results for charge transport in quantum paraelectrics and relaxation processes in dielectrics.
