## A Functional Renormalization Group Study of Correlated Electrons

**Speaker:**Nahom Yirga

**When:**September 15, 2016 (Thu), 12:45PM to 01:45PM (add to my calendar)

**Location:**SCI 352

*This event is part of the Preliminary Oral Exam. *

Examining Committee: David Campbell, Anders Sandvik, Emanuel Katz, Shyam Erramilli

Abstract:

We use the functional renormalization group(fRG) scheme to study the dynamics of strongly correlated fermions on a lattice. The proposed approach extends the fRG to account for dynamical corrections to the vertex, the renormalization of the propagator due to the self-energy and momentum dependant interactions away from the fermi surface. Using this approach we study the ground state phase diagram of Hubbard Models with bond-charge interactions and multi-orbital Hubbard models. We propose a generalized fRG scheme for any two dimensional multi-band model.