Quantum version of the Hall effect.
As you increase the magnetic field, you can see the Hall resistance increase, but it does so in discrete steps.
Figure 1. Hall resistance as a function of the applied magnetic field showing the Quantum Hall effect. Source. As we can see, the blue line of the Hall resistance TODO material, temperature, etc. It is unclear if this is just
Gotta understand this because the name sounds cool. Maybe also because it is used to define the fucking ampere in the 2019 redefinition of the SI base units.
At least the experiment description itself is easy to understand. The hard part is the physical theory behind.
The effect can be separated into two modes:
TODO original experiment?
Laughlin paper: 1981 Quantized Hall conductivity in two dimensions.
Shows a cool new type of matter: Abelian anyons.