Seminarium Fizyki Materii Skondensowanej

During my talk I will readdress the problem of the description of quantum criticality in 2D fermionic systems. Based on the most prominent example, nematic quantum criticality, I will describe the major physical features of the system, such as the Landau damping of collective modes or a non-Fermi liquid behaviour of single particle excitations. I will also explain the main obstacles to formulating a satisfactory theory of critical Fermi surfaces. In the second part of my talk I will present the main result of application of the functional renormalization group method to this problem.