Physics Colloquium: How the Hall effect tells us what carrieres carry the current

Recording: https://youtu.be/j1eKN9Sf2vQ

Abstract: 

The Hall coefficient R_H  is phenomenologically assumed to measure the electron or hole density in metals and semiconductors. However, this approach cannot explain ‘’Hall anomalies’’  in strongly correlated metals and superconductors. Recent advances in quantum transport theory allow us to calculate the R_H  beyond weak scattering regimes. We learn that  while R_H still characterizes  the "moving parts" of the current, these could be very different from the conduction electrons  of  conventional bandstructure theory.

Event Organizer: Prof. Lev Vaidman