What carries the Hall current in metals and superconductors? (Assa Auerbach / Seminar / LPT). – 6/02/2023, 14H

Assa Auerbach (Technion, Haïfa)

Seminar LPT, Tuesday February 6, 2023 – 14:00 – Seminar room, 3R1 – 3rd floor

Abstract:
The Hall coefficient has long been used to characterize the charge carriers as Fermi surface quasiparticles. However, unexpected Hall coefficient sign reversals and divergences (a.k.a. « Hall anomalies’’) are commonly observed in strongly correlated metals and flux flowing superconductors. The validity of band theory and Boltzmann equation is called into question.

I will describe recent advances in quantum transport theory which allows us to calculate the Hall coefficients from models of strong interactions, and to identify the « moving parts » which give rise to these Hall anomalies.