Quantum Hall Edge States — Chiral Channels

En = ℏωc(n+½)  |  Landau levels bend at edge → chiral current  |  σxy = νe²/h

Filling ν 2
σxy = νe²/h
Edge channels
ρxx 0 (plateau)
Chiral edge states = backscatter-free
Each filled Landau level → 1 edge channel
Hall plateau: σ_xy = integer × e²/h