February 25th
when: Tuesday 25/02/2019, 11:00
where: KE E-541 (møterom)
speaker: Matthias Punk
title: Metals with topological order
abstract:
While ordinary metals are very well understood in terms of Landau’s Fermi liquid theory, several strongly correlated electron materials show a very unusual metallic behavior, which deviates substantially from Fermi liquid expectations. In this talk I’m going to discuss how electron fractionalization can lead to interesting metallic phases with topological order. The low energy properties of these phases are described by strongly coupled gauge theories and I will show how they arise quite naturally from simple models of interacting electrons. Finally I will argue that such unconventional metallic phases capture several key properties of the so-called pseudogap phase in cuprate high-temperature superconductors.