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What is "strange" about non-Fermi liquid metals?

Seminar über Theoretische Festkörperphysik

Vortragender:

Debanjan Chowdhury

Datum:

21.10.2019 14:00

Ort:

Room 10.01, 10th Floor, Bldg. 30.23, KIT Campus South

Zugehörigkeit:

Cornell University, Ithaca, New York, USA

Gastgeber:

Prof. Dr. Jörg Schmalian

Abstract

The concept of electronic quasiparticles, as introduced by Landau, is one of the cornerstones of the theory of quantum many-body systems. However, a growing number of recent experiments in strongly correlated quantum materials have forced us to confront the existence of quantum matter for which the concept of electronic quasiparticles does not apply. Inspired by the rich phenomenology of the parent states of numerous high-temperature superconductors, I will describe some recent progress in our understanding of metallic states that do not admit a quasiparticle description but that nonetheless have a sharply defined Fermi surface. I will also present some experimental results on unconventional transport properties of magic-angle twisted bilayer graphene and comment on their possible connections with the rest of my talk.